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ASTM A325,A490
HNF
20170614
Heavy hex structural bolts are designed for steel-to-steel structural connections. Consequently, they are typically very short. The A325 and A490 specifications are not intended for general applications, including anchor bolts. In these applications, substitutions of A449 for A325 and A354 grade BD for A490 should be considered.Hex Heavy structural bolts are designed for steel-to-steel structural connections. The ASTM A325 and A490 specifications cover high strength heavy hex structural bolts from 1/2" to 1-1/2" diameter. These bolts are intended for use in structural connections and it have shorter thread lengths than standard hex bolts. The A325 and A490 specifications are not intended for general applications.
The ASTM A490 specification covers quenched and tempered, alloy steel, heavy hex structural bolts from 1/2" to 1-1/2" diameter with a 150 ksi to 173ksi tensile. A490 bolts are similar in application and dimensions to A325 Hex Cap Screws heavy hex structural bolts but are made from an alloy steel rather than a medium carbon steel, resulting in a higher strength fastener.
Heavy hex structural bolts are designed for steel-to-steel structural connections. Consequently, they are typically very short. The A325 and A490 specifications are not intended for general applications, including anchor bolts. In these applications, substitutions of A449 for A325 and A354 grade BD for A490 should be considered.Hex Heavy structural bolts are designed for steel-to-steel structural connections. The ASTM A325 and A490 specifications cover high strength heavy hex structural bolts from 1/2" to 1-1/2" diameter. These bolts are intended for use in structural connections and it have shorter thread lengths than standard hex bolts. The A325 and A490 specifications are not intended for general applications.
The ASTM A490 specification covers quenched and tempered, alloy steel, heavy hex structural bolts from 1/2" to 1-1/2" diameter with a 150 ksi to 173ksi tensile. A490 bolts are similar in application and dimensions to A325 Hex Cap Screws heavy hex structural bolts but are made from an alloy steel rather than a medium carbon steel, resulting in a higher strength fastener.
