Northeast Fasteners 1-800-872-5557

#4-40 x 1/2 Hex Head Machine Screws Qty (100)


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#4-20 x 1/2 Coarse (USS) Hex Head Machine Screws are made of zinc-plated steel which allows for a moderate amount of corrosion resistance. Hex head screws allow for more torque to be applied to the screw with a socket wrench. Machine screws are most often used with a nut as a means of tightening unless they have a pre-threaded hole with the exact thread pitch. These screws are most commonly offered in smaller sizes. Other types of machine screws sold at are: phillips flat head machine screws, stainless steel flat head machine screws and phillips flat head tapping screws.

Diameter: #4
Length: 1/2 inch
Thread Size: 20
Drive: Hex/
  • Model: HMS412C
  • Shipping Weight: 0.16lbs

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