Hex Bolts Grade 5 Zinc Plated 5/8 -18 x 8 (Quantity: 25 pcs) Partially Threaded UNF Thread (Thread Size: 5/8 ) x (Length: 8 )

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 1.75 inches of thread Head Height: 25/64 in. / Width Across the Flats: 15/16 in.