Type F machine screws, Star drive flat head type F (trailer screws), Steel black phosphate finish, 1/4"-20
Flat head machine screw length is measured from the top of the head to the end of the screw.
Resources
See also |
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Metric machine screwsScrews with machine threads for use with a nut or in a tapped hole. |
Socket screwsScrews with an Allen wrench drive. |