Showing posts with label 632. Show all posts
Showing posts with label 632. Show all posts

Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 1/2" Length (Pack of 25)

Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 1/2" Length (Pack of 25) Reviews



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Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 1/2" Length (Pack of 25) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Polypropylene is suitable for applications where resistance to chemicals and water (including steam) is important
  • Flat head style allows fastener to sit flush to the surface
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Polypropylene is a thermoplastic which is autoclavable (meaning that it can be sterilized using steam), and is non-hydroscopic (it won't absorb water even after extended periods of contact). Polypropylene has excellent chemical resistance to dilute acids, concentrated acids (except oxidizing acids), alkalis, alcohols, detergents, and water. Polypropylene resists aromatic hydrocarbons, chlorinated hydrocarbons, greases, and oils at room temperature. Maximum operating temperature is 212 degrees Fahrenheit. Polypropylene has a low co-efficient of friction and a high dielectric strength (meaning it operates well as an insulator). Polypropylene has approximately half the tensile strength and impact strength of Nylon 6/6. The tensile strength of Polypropylene is 5000 psi (pounds per square inch). Impact Strength, as measured by the Izod impact test method (which measures force required to break material) is 0.5 pounds per foot.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Oct 09, 2011 13:15:04

Polypropylene Machine Screw, Pan Head, Phillips Drive, #6-32, 1-1/4" Length (Pack of 100)

Polypropylene Machine Screw, Pan Head, Phillips Drive, #6-32, 1-1/4" Length (Pack of 100) Reviews



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Polypropylene Machine Screw, Pan Head, Phillips Drive, #6-32, 1-1/4" Length (Pack of 100) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Polypropylene is suitable for applications where resistance to chemicals and water (including steam) is important
  • Pan head allows for higher tightening torques
  • Phillips drive is designed to cam out under too much torque
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Polypropylene is a thermoplastic which is autoclavable (meaning that it can be sterilized using steam), and is non-hydroscopic (it won't absorb water even after extended periods of contact). Polypropylene has excellent chemical resistance to dilute acids, concentrated acids (except oxidizing acids), alkalis, alcohols, detergents, and water. Polypropylene resists aromatic hydrocarbons, chlorinated hydrocarbons, greases, and oils at room temperature. Maximum operating temperature is 212 degrees Fahrenheit. Polypropylene has a low co-efficient of friction and a high dielectric strength (meaning it operates well as an insulator). Polypropylene has approximately half the tensile strength and impact strength of Nylon 6/6. The tensile strength of Polypropylene is 5000 psi (pounds per square inch). Impact Strength, as measured by the Izod impact test method (which measures force required to break material) is 0.5 pounds per foot.

Pan head fasteners have a low, large cylindrical head with a high rounded top edge for higher tightening torques - these fasteners are often recommended to replace older head styles such as round, binding, or truss-head where possible. The Phillips drive style was originally designed so that the driver would slip out under extreme torque, preventing over-tightening and damage to the fastener or the material.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Sep 27, 2011 08:46:06

Nylon 6/6 Machine Screw, Binding Head, Slotted Drive, #6-32, 3/16" Length (Pack of 25)

Nylon 6/6 Machine Screw, Binding Head, Slotted Drive, #6-32, 3/16" Length (Pack of 25) Reviews



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Nylon 6/6 Machine Screw, Binding Head, Slotted Drive, #6-32, 3/16" Length (Pack of 25) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Nylon 6/6 is suitable where non-conductivity, corrosion resistance, and cost are important considerations
  • Binding head provides a large surface area for extra surface contact under the head
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Nylon 6/6 is a general purpose thermoplastic with outstanding resistance to organic chemicals, acids and alkalis. Nylon wears well against other surfaces; it is readily machinable and may be milled, turned and cut with conventional machine tools. It does exhibit some dimensional swelling in wet applications which should be taken into account with its use. Tensile strength of this material is 12,000 psi (pounds per square inch).

Generally used in electrical or radio work, these fasteners are slightly undercut under the head. That provides the ability to bind stranded wire tightly and prevent fraying. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Sep 09, 2011 16:23:07

PVC Machine Screw, Flat Head, Slotted Drive, #6-32, 5/8" Length (Pack of 25)

PVC Machine Screw, Flat Head, Slotted Drive, #6-32, 5/8" Length (Pack of 25) Reviews



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PVC Machine Screw, Flat Head, Slotted Drive, #6-32, 5/8" Length (Pack of 25) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • PVC is suitable where insulating properties are important and/or where exposure to water is expected
  • Flat head style allows fastener to sit flush to the surface
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Polyvinylchloride, or PVC, exhibits little or no water absorption, absorbing 0.05% of its weight after 24 hours of exposure to water. Because it is chlorinated, PVC also possesses natural flame retardant qualities. PVC has one of the highest dielectric strengths of plastics, at 1413 volts per millimeter, making it an excellent insulator. PVC possesses average to above average strength compared to other plastics, with a tensile strength of 7450 psi (pounds per square inch) and an impact strength of 5 force pounds (Izod Impact Scale). The primary drawback of PVC is its low melting point temperature of 140 degrees Fahrenheit.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Aug 21, 2011 11:58:05

Brass Machine Screw, Flat Head, Slotted Drive, #6-32, 1/4" Length (Pack of 100)

Brass Machine Screw, Flat Head, Slotted Drive, #6-32, 1/4" Length (Pack of 100) Reviews



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Brass Machine Screw, Flat Head, Slotted Drive, #6-32, 1/4" Length (Pack of 100) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Brass is suitable where corrosion resistance is a primary consideration
  • Flat head style allows fastener to sit flush to the surface
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Brass is rust proof, corrosion resistant and polishes to a rich, golden color. Brass is easily soldered and brazed and accepts plating readily. The typical composition is 70% Copper and 30% Zinc. Strength increases with a higher percentage of Zinc.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Aug 19, 2011 21:42:25

Fiberglass Machine Screw, Flat Head, Slotted Drive, #6-32, 5/8" Length (Pack of 1)

Fiberglass Machine Screw, Flat Head, Slotted Drive, #6-32, 5/8" Length (Pack of 1) Reviews



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Fiberglass Machine Screw, Flat Head, Slotted Drive, #6-32, 5/8" Length (Pack of 1) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Fiberglass is suitable for applications where tensile strength to weight, non-conductivity and corrosion resistance are all important considerations
  • Flat head style allows fastener to sit flush to the surface
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Nonconductive and resistant to many corrosives, Fiberglass is a good choice for applications threatened by salt water, oils, mild solvents, and other harsh environments. G-10 is a glass reinforced fiberglass, utilizing a continuous woven glass fabric laminated with an epoxy resin. The glass reinforcing increases tensile strength over non-reinforced fiberglass, G-10 in particular is rated at 38,000 psi (pounds per square inch range). G-10 exhibits a high tensile strength to weight ratio, approximately twice that of Aluminum 2024, for example. G-10 is very non-porous, and will only absorb 0.1% of water if left to soak for 24 hours. G-10 is flame retardant and will operate at temperatures up to 280 degrees without degrading. This material is recommended for applications where superior strength and excellent electrical insulative properties are required over a wide range of temperatures.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Aug 02, 2011 09:35:04

Zinc Plated Steel Machine Screw, Flat Head, Phillips Drive, #6-32, 1" Length (Pack of 100)

Zinc Plated Steel Machine Screw, Flat Head, Phillips Drive, #6-32, 1" Length (Pack of 100) Reviews



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Zinc Plated Steel Machine Screw, Flat Head, Phillips Drive, #6-32, 1" Length (Pack of 100) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Zinc Plated Steel fasteners are suitable where strength and corrosion resistance are primary considerations
  • Flat head style allows fastener to sit flush to the surface
  • Phillips drive is designed to cam out under too much torque
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Steels are designated by a 4 number SAE Steel grade.  The first two digits indicate the primary materials used to form the steel.  The last 2 digits identify the percentage of carbon for the alloy (in hundredths).  The steel used in these fasteners has a tensile strength ranging from 100,000 to 150,000 psi (pounds per square inch).  Zinc Plating helps to prevent corrosion.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. The Phillips drive style was originally designed so that the driver would slip out under extreme torque, preventing over-tightening and damage to the fastener or the material.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Jul 10, 2011 17:13:05

Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 3/4" Length (Pack of 100)

Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 3/4" Length (Pack of 100) Reviews



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Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 3/4" Length (Pack of 100) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Polypropylene is suitable for applications where resistance to chemicals and water (including steam) is important
  • Flat head style allows fastener to sit flush to the surface
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Polypropylene is a thermoplastic which is autoclavable (meaning that it can be sterilized using steam), and is non-hydroscopic (it won't absorb water even after extended periods of contact). Polypropylene has excellent chemical resistance to dilute acids, concentrated acids (except oxidizing acids), alkalis, alcohols, detergents, and water. Polypropylene resists aromatic hydrocarbons, chlorinated hydrocarbons, greases, and oils at room temperature. Maximum operating temperature is 212 degrees Fahrenheit. Polypropylene has a low co-efficient of friction and a high dielectric strength (meaning it operates well as an insulator). Polypropylene has approximately half the tensile strength and impact strength of Nylon 6/6. The tensile strength of Polypropylene is 5000 psi (pounds per square inch). Impact Strength, as measured by the Izod impact test method (which measures force required to break material) is 0.5 pounds per foot.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Jul 03, 2011 04:29:04

Black Nylon 6/6 Machine Screw, Binding Head, Combination Phillips-Slotted Drive, #6-32, 1" Length (Pack of 100)

Black Nylon 6/6 Machine Screw, Binding Head, Combination Phillips-Slotted Drive, #6-32, 1" Length (Pack of 100) Reviews



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Black Nylon 6/6 Machine Screw, Binding Head, Combination Phillips-Slotted Drive, #6-32, 1" Length (Pack of 100) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Nylon 6/6 is suitable where non-conductivity, corrosion resistance, and cost are important considerations; black color
  • Binding head provides a large surface area for extra surface contact under the head
  • Accommodates both Phillips and Slotted drivers
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Nylon 6/6 is a general purpose thermoplastic with outstanding resistance to organic chemicals, acids and alkalis. Nylon wears well against other surfaces; it is readily machinable and may be milled, turned and cut with conventional machine tools. It does exhibit some dimensional swelling in wet applications which should be taken into account with its use. Tensile strength of this material is 12,000 psi (pounds per square inch).

Generally used in electrical or radio work, these fasteners are slightly undercut under the head. That provides the ability to bind stranded wire tightly and prevent fraying. Combination Phillips-Slotted drive styles allow for greater flexibility in choosing a drive tool (either Phillips or standard slotted).

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Jun 19, 2011 20:41:03

Nylon Machine Screw, Fillister Head, Phillips Drive, #6-32, 7/8" Length (Pack of 50)

Nylon Machine Screw, Fillister Head, Phillips Drive, #6-32, 7/8" Length (Pack of 50) Reviews



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Nylon Machine Screw, Fillister Head, Phillips Drive, #6-32, 7/8" Length (Pack of 50) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Nylon 6/6 is suitable where non-conductivity, corrosion resistance, and cost are important considerations
  • Fillister head for high torque and good hold-down strength
  • Phillips drive is designed to cam out under too much torque
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Nylon 6/6 is a general purpose thermoplastic with outstanding resistance to organic chemicals, acids and alkalis. Nylon wears well against other surfaces; it is readily machinable and may be milled, turned and cut with conventional machine tools. It does exhibit some dimensional swelling in wet applications which should be taken into account with its use. Tensile strength of this material is 12,000 psi (pounds per square inch).

Fillister head fasteners are considered an improvement over round head equivalents - the smaller head creates more downward pressure for a given torque level and the thicker head plus deeper drive slot allows higher torque levels to be generated. The Phillips drive style was originally designed so that the driver would slip out under extreme torque, preventing over-tightening and damage to the fastener or the material.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Jun 13, 2011 23:55:05

Fiberglass Machine Screw, Flat Head, Slotted Drive, #6-32, 3/8" Length (Pack of 1)

Fiberglass Machine Screw, Flat Head, Slotted Drive, #6-32, 3/8" Length (Pack of 1) Reviews



Other Picture


Fiberglass Machine Screw, Flat Head, Slotted Drive, #6-32, 3/8" Length (Pack of 1) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Fiberglass is suitable for applications where tensile strength to weight, non-conductivity and corrosion resistance are all important considerations
  • Flat head style allows fastener to sit flush to the surface
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Nonconductive and resistant to many corrosives, Fiberglass is a good choice for applications threatened by salt water, oils, mild solvents, and other harsh environments. G-10 is a glass reinforced fiberglass, utilizing a continuous woven glass fabric laminated with an epoxy resin. The glass reinforcing increases tensile strength over non-reinforced fiberglass, G-10 in particular is rated at 38,000 psi (pounds per square inch range). G-10 exhibits a high tensile strength to weight ratio, approximately twice that of Aluminum 2024, for example. G-10 is very non-porous, and will only absorb 0.1% of water if left to soak for 24 hours. G-10 is flame retardant and will operate at temperatures up to 280 degrees without degrading. This material is recommended for applications where superior strength and excellent electrical insulative properties are required over a wide range of temperatures.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Jun 08, 2011 06:03:09

Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 7/8" Length (Pack of 100)

Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 7/8" Length (Pack of 100) Reviews



Other Picture


Polypropylene Machine Screw, Flat Head, Slotted Drive, #6-32, 7/8" Length (Pack of 100) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Polypropylene is suitable for applications where resistance to chemicals and water (including steam) is important
  • Flat head style allows fastener to sit flush to the surface
  • Driven by a flat-bladed driver
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Polypropylene is a thermoplastic which is autoclavable (meaning that it can be sterilized using steam), and is non-hydroscopic (it won't absorb water even after extended periods of contact). Polypropylene has excellent chemical resistance to dilute acids, concentrated acids (except oxidizing acids), alkalis, alcohols, detergents, and water. Polypropylene resists aromatic hydrocarbons, chlorinated hydrocarbons, greases, and oils at room temperature. Maximum operating temperature is 212 degrees Fahrenheit. Polypropylene has a low co-efficient of friction and a high dielectric strength (meaning it operates well as an insulator). Polypropylene has approximately half the tensile strength and impact strength of Nylon 6/6. The tensile strength of Polypropylene is 5000 psi (pounds per square inch). Impact Strength, as measured by the Izod impact test method (which measures force required to break material) is 0.5 pounds per foot.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. Common applications for slotted screws include woodworking, although the drive style is not designed to be used with power drivers.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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Jun 03, 2011 11:45:05

Zinc Plated Steel Machine Screw, Flat Head, Phillips Drive, #6-32, 3/8" Length (Pack of 100)

Zinc Plated Steel Machine Screw, Flat Head, Phillips Drive, #6-32, 3/8" Length (Pack of 100) Reviews



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Zinc Plated Steel Machine Screw, Flat Head, Phillips Drive, #6-32, 3/8" Length (Pack of 100) Feature

  • Machine Screws are often used with nuts or driven into tapped holes
  • Zinc Plated Steel fasteners are suitable where strength and corrosion resistance are primary considerations
  • Flat head style allows fastener to sit flush to the surface
  • Phillips drive is designed to cam out under too much torque
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Steels are designated by a 4 number SAE Steel grade.  The first two digits indicate the primary materials used to form the steel.  The last 2 digits identify the percentage of carbon for the alloy (in hundredths).  The steel used in these fasteners has a tensile strength ranging from 100,000 to 150,000 psi (pounds per square inch).  Zinc Plating helps to prevent corrosion.

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. The Phillips drive style was originally designed so that the driver would slip out under extreme torque, preventing over-tightening and damage to the fastener or the material.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.


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May 27, 2011 19:23:04