Materials for High Strength Hexagon Bolts

There are three kinds of materials for high strength hexagon bolts, as follows: (1) carbon steel. Generally, hexagonal bolt manufacturers distinguish low carbon steel, medium carbon steel, high carbon steel and alloy steel according to carbon content in carbon steel. 1. Low carbon steel C% ≤ 0.25% is usually called A3 steel in China. It [...]

Dacromet Bolt Coating Featurers

Dacromet bolt coating- apply coating (colored coating, Dacromet) on the workpiece as required, with appearance of silver, black or color, and salt spray test for more than 240 hours. Dacromet: the appearance of Dacromet coating is uniform silver gray. The coating contains 80% thin zinc sheet and aluminum sheet, and the rest is chromate. It [...]

By |July 18th, 2020|A325, ASTM International Standard, Bolt Types, Countersunk Bolt, F3125, F568M, Hex Bolts, Hexagon Bolt, Socket Head Bolts, Stud Bolt|Comments Off on Dacromet Bolt Coating Featurers
  • ASTM A325


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. It defines mechanical properties for bolts that range from 1⁄2 to 1 1⁄2 inches (13 to 38 mm) in diameter. The equivalent metric standard is ASTM A325M, which is [...]

  • ASTM A325 Specifications

ASTM A325 Specifications

ASTM A325 Specifications Prior to its withdrawl in 2016, the ASTM A325 specifications covered high strength heavy hex structural bolts from 1/2″ diameter through 1-1/2″ diameter. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. Refer to the Structural Bolts page of our site for [...]

By |October 10th, 2019|A325, A563, ASTM International Standard, F3125|Comments Off on ASTM A325 Specifications