A325 Structural Bolts, 1/2"-13 x 4", Steel, Plain Finish by LRKD Industries

These are American-made hex bolts, specifically designed as structural bolts of type A325. They're crafted from robust steel and feature a plain, unplated finish. The threading is coarse, with a diameter of half an inch and 13 threads per inch. The bolts are four inches long, with a tolerance of plus or minus 0.12 inches. They're suitable for structural use, with a right-hand thread direction, and a hex head style. The drive type is external hex, with a head height ranging from 0.302 to 0.323 inches. The width across the flats is 7/8 inches. They're not fully threaded, with a minimum thread length of one inch and a minimum body length of 2.81 inches. They conform to the ASME B18.2.6 dimensional standard.