Steel Alloy, UNC (Coarse) & UNF (Fine) thread, Plain & Zinc plated, 1936 Series Full Thread, Nylon Patch, & Tamper Resistant socket head cap screws.
#4-40 x 1/4" thru 3/8"-16 x 1 1/2", Tamper Resistant, UNC (Coarse) Thread
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