Hex Bolts Grade 5 Zinc Plated 5/16 -24 x 4 (Quantity: 50 pcs) Partially Threaded UNF Thread (Thread Size: 5/16 ) x (Length: 4 )

Grade 5 Steel with a Zinc Finish and manufactured to ASME B18.2.1 Zinc-plated steel screws to resist corrosion in wet environments Meets ASME B18.2.1 and SAE J429 specifications These are PARTIALLY Threaded Bolts with a minium of 0.875 inches of thread Head Height: 13/64 in. / Width Across the Flats: 1/2 in.