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A325 Heavy Hex Bolts

A325 heavy hex bolts are high-strength structural bolts designed for steel-to-steel connections in critical applications such as bridge construction and structural steel projects. These bolts are manufactured according to ASTM A325 standards, ensuring superior tensile strength and mechanical performance. The heavy hex head design provides larger wrenching surfaces for higher torque, ensuring secure and durable connections. A325 bolts are widely used in industries where high strength and reliable fastening are essential.

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Key Features

High Strength: Ideal for high-load structural applications, offering excellent tensile strength and durability.

Heavy Hex Head: The larger head size enhances wrenching capability, allowing for higher torque application.

ASTM A325 Standard: Meets strict mechanical property and dimensional standards for quality and reliability.

Corrosion Resistance: Available with zinc plating, stainless steel, or other finishes for use in outdoor or harsh environments.

Specifications Table

Parameter	Description
Standard	ASTM A325
Material	Carbon Steel, Stainless Steel
Surface Treatment	Zinc Plated, Black Oxide, etc.
Diameter Range	1/2" - 1-1/2"
Length Range	1" - 12"
Head Type	Heavy Hex Head
Mechanical Property	Tensile Strength > 120 ksi (approx. 827 MPa)
Applications	Steel Structures, Bridges, Construction, Machinery

Applications

Steel Structure Connections,Bridge Construction,Machinery Installation,Construction and Infrastructure Projects

Product Standards

Thread Specifications
Thread Size (d)	ds Max	ds Min	s Nominal	s Max	s Min	e Max	e Min	k Nominal	k Max	k Min	b Reference
1/2	0.515	0.482	7/8	0.875	0.85	1.01	0.969	5/16	0.323	0.302	1
5/8	0.642	0.605	1-1/16	1.062	1.031	1.227	1.175	25/64	0.403	0.378	1.25
3/4	0.768	0.729	1-1/4	1.25	1.212	1.443	1.383	15/32	0.483	0.455	1.38
7/8	0.895	0.852	1-7/16	1.438	1.394	1.66	1.589	35/64	0.563	0.531	1.5
1	1.022	0.976	1-5/8	1.625	1.575	1.876	1.796	39/64	0.627	0.591	1.75
1-1/8	1.149	1.098	1-13/16	1.812	1.756	2.093	2.002	11/16	0.718	0.658	2
1-1/4	1.277	1.223	2	2	1.938	2.309	2.209	25/32	0.813	0.749	2
1-3/8	1.404	1.345	2-3/16	2.188	2.119	2.526	2.416	27/32	0.878	0.81	2.25
1-1/2	1.531	1.47	2-3/8	2.375	2.3	2.742	2.622	15/16	0.974	0.902	2.25

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