Heavy Hex A325 structural bolts are designed for steel to steel structural connections. For this reason, they are typically very short. The A325 and A490 specifications are not intended for general applications, including anchor bolts. For additional details and specifications, please refer to our technical information on ASTM A325.

A193 B7 Heavy Hex Bolts offer a wider head than that of a standard hex bolt and are made of low-to-mid-carbon steel. The large head offers a greater bearing surface that distributes the clamping load over a greater area. Made of alloy steel, AISI 4140/4142 quenched and tempered.

These A490 Type 1 (medium carbon and alloy steel) structural bolts are designed for use in structural connections and subsequently have shorter thread lengths than standard hex bolts. A490 bolts are similar to A325 heavy hex structural bolts but are manufactured from an alloy steel instead of medium carbon steel, making them a higher strength fastener.