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#5

40

For most fasteners, length is measured from where the material is assumed to be to the tip. Countersunk fasteners are measured overall. Most other fasteners are measured from under the head.

US

3/16" (1) 1/4" (1) 5/16" (1) 3/8" (1) 1/2" (1) 5/8" (1) 3/4" (1) 1" (1) 1-1/4" (1) 1-1/2" (1)

Allen

Button

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Allen button head, #5-40

US Fasteners, Allen button head, #5-40

Socket button head screw

Socket screws

Screws with an Allen wrench drive.

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