UNC HEX HEAD BOLTS. UNC Thread (Imperial coarse). A2 Stainless Steel (For increased corrosion resistance ). 5/16" 1" 1/2" 7/32" 18. 5/16" 1 1/2" 1/2" 7/32" 18. 5/16" 1 1/4" 1/2" 7/32" 18. 5/16" 3/4" 1/2" 7/32" 18.
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