Thread Guage Block

Determine the thread size of your bolts by threading them through the holes in this print.

M2, M2.5, M3, M4, M6

UNF: #6-40, #8-36, #10-32, #12-28, 1/4-28

UNC: #6-32, #8-32, #10-24, #12-24, 1/4-20