Hex Bolts Grade 5 Yellow Zinc 5/16 -18 x 3 (Quantity: 100 pcs) Partially Threaded UNC Thread (Thread Size: 5/16 ) x (Length: 3 )

Grade 5 Steel with a Yellow 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.