Prior to its withdrawal in 2016, the ASTM A325 specification covered high strength heavy hex structural bolts from 1/2″ diameter through 1-1/2″ diameter. These bolts are intended for use in structural …

ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength.

The ASTM A325 standard was withdrawn in 2016 and replaced by ASTM F3125/F3125M. Except for the dimensions, the information on this page is for reference and historical purposes only.

ASTM A325 covers high strength structural bolts used in structural steel connections. A325s have a heavy hex head, a full body diameter, and are normally short in overall length since they are …

They meet ASTM A325 and ASTM F3125 standards for structural applications. Since the head is 10% wider than a standard hex head, it spreads force over a larger area, and you can tighten these …

Jul 5, 2025 · Type 1 A325 bolts, made of plain carbon steel, are intended for non-coated applications, while Type 3 A325 bolts have a hot-dipped galvanized coating for enhanced corrosion resistance, …

ASTM A325 specification covers two types of quenched and tempered steel heavy hex bolts in metric and imperial sizes for structural purpose. The specification includes type 1 & type 3 fastener material …

Aug 16, 2017 · 1.1 This specification covers two types of quenched and tempered steel heavy hex structural bolts having a minimum tensile strength of 120 ksi for sizes 1.0 in. and less and 105 ksi for …

ASTM A325 TECHNICAL SPECIFICATIONS SCOPE meter through 1-1/2” diameter. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard …

May 17, 2025 · A325 steel is specifically formulated to meet the requirements of high-strength bolting in structural applications. Its classification as a medium-carbon alloy steel allows it to achieve a balance …