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Dottie® Machine Screw, 1/4-20 Thread, UNC Thread, 1/2 in Overall Length, 0.472 to 0.443 in Dia x 0.175 to 0.16 in H Head, Round Head, #3 Drive, Phillips®, Slotted Drive, Carbon Steel, Finish: Zinc-Plated
Machine screws are uniformly threaded screws designed to be fastened into tapped holes, or used in conjunction with nuts to join two or more assemblies together. Typical applications for machine screws include fastening components of tools, appliances, machines, and electronic devices. ASME B18.3 covers the general requirements for the dimensions and performance of steel machine screws.