Hex Bolts Grade 5 Plain Finish 5/16 -18 x 4 1/2 (Quantity: 50 pcs) Made in USA Partially Threaded UNC Thread (Thread 5/16 ) x (Length: 4 1/2 )

Grade 5 Steel with a Plain Finish and manufactured to ASME B18.2.1 Plain steel surface (no finish or coatings) will corrode 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.