What Are Heavy Hex Bolts

Heavy-duty hex bolts are a kind of hex bolts. Their heads are generally large. Commonly used A325, A325M, A490, A490M and other standards, and American Standard ASME/ANSI B18.2.1-1981, GBB1228 and other steel structure heavy-duty hex bolts. Heavy-duty hex bolts are used for heavy-duty nuts A193, A194, A563, etc., mainly used in construction, automotive, bridge and tunnel industries.