Brass Machine Screw, Pan Head, Phillips Drive, 1/4"-20, 1/2" Length (Pack of 100)
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Customer Review
Good deal
These are a good deal. They're adequately strong, and look pretty. Mostly, though, they're pretty long - I bought these because they cost less than any shorter length, and I can just cut them to size.
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Great little machine screws
I'm not sure quite what to say about these. They work like any other machine screw, and are made very well. The length was correct. They are all brass (not brass plated) which is a nice plus.
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Product Description
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.
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. Top to learn more

