Aluminum Machine Screw, Round Head, Phillips Drive, 1/4"-20, 1-1/2" Length (Pack of 50) Reviews
Aluminum Machine Screw, Round Head, Phillips Drive, 1/4"-20, 1-1/2" Length (Pack of 50) Feature
- Machine Screws are often used with nuts or driven into tapped holes
- Aluminum is suitable for applications where weight and corrosion resistance are primary considerations
- Round head style for a finished appearance
- 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
Aluminum is composed of bauxite and alumina. Pure (99%) Aluminum melts at 1220 degrees Fahrenheit. It has approximately two-thirds of the thermal and electrical conductivity of copper. Aluminum has a high strength to weight ratio and is resistant to tarnishing and corrosion. Aluminum is an extremely versatile material, it may be cast or wrought, it is available in a wide range of alloys and tempers, and it accepts many types of surface finishes, including anodizing. Aluminum is easy to machine, solder and weld.
Round head fasteners have a dome-shaped head. An older style of head, it is typically used when replacing existing round-head fasteners where an exact match is desired. 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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Mar 19, 2011 12:20:04
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