1/4 5/16 3/8 7/16 1/2" UNF SET SCREWS NUTS & WASHERS HEX HEAD BOLTS ZINC PLATED

Hex Bolts - UNF. UNF Bolts & Set Screws. 1/4" / 5/16" / 3/8" / 7/16" / 1/2" UNF Set Screws – Zinc Plated Steel (Hex Head Bolts with Nuts & Washers). Thread Type: Unified Fine (UNF). Hex Bolts - UNC. Hex Full Nuts.

eBay