ASTM A325M Heavy Hex Bolt

Description

Description

We stock 6 mm to 64 mm diameter in various length Normal and Heavy Hex bolts. We also have in above in imperial sizes also ASTM A325M is an ASTM International standard for heavy hex structural bolts, whereas titled Standard Specification for Structural Bolts, Generally Steel, Heat Treated, 800/830 N/mm2/Mpa Minimum Tensile Strength.
Dimensions as per ASME B18.2.6 / ASME B18.2.3.7M
Material and physical properties per ASTM A325M T-1

MKM Fasteners proudly offers ASTM A325M Heavy Hex Bolts, engineered for demanding structural applications. Manufactured from high-quality carbon steel, alloy steel, and weathering steel, these bolts are heat-treated to deliver superior strength and durability in high-load environments such as bridges, buildings, towers, and steel structures.

We supply a wide diameter range from ½” to 4” in the Inch Series and M10 to M64 in the Metric Series, covering both normal and heavy hex designs. Additionally, we stock imperial sizes from 6 mm to 64 mm in varying lengths to suit a wide array of construction and industrial requirements.

Our bolts are produced in compliance with ASTM A325 / A325M Type 1 standards, which specify a minimum tensile strength of 800 to 830 N/mm² (MPa), ensuring excellent mechanical performance and load-bearing capacity. These properties make them ideal for critical structural joints that demand consistent reliability and long-term strength.

Dimensions are strictly maintained as per ASME B18.2.6 and ASME B18.2.3.7M, ensuring a precise fit and compatibility with structural connections. Each bolt undergoes stringent quality checks to meet both material and physical property specifications outlined under ASTM standards.

Whether you require structural fasteners for steel frameworks, infrastructure development, or heavy fabrication projects, MKM Fasteners’ ASTM A325M Heavy Hex Bolts provide the trusted performance and safety you need.

We also offer customized finishes and material grades on request. For special requirements or large orders, contact our expert team for tailored solutions.

Choose MKM Fasteners – your reliable source for structural bolting solutions that meet international standards.