Hex Bolts - UNF. 1/4" / 5/16" / 3/8" UNF Set Screws – A2 Stainless Steel (Hex Head Bolts with Nuts & Washers). UNF Bolts & Set Screws. Thread Type: Unified Fine (UNF). Hex Bolts - UNC. Hex Full Nuts. Form A Flat Washers.
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