A325M

A325M – 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 titled Standard Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength. It defines mechanical properties for sizes M12–36.

This is a standard set by the standards organization ASTM International, a voluntary standards development organizations that sets technical standards for materials, products, systems, and services.

ASTM A325 / A325M

In 2016, ASTM officially withdrew specification A325 and replaced it with ASTM F3125. To minimize confusion, bolt head markings are unchanged and the designation is retained as a grade name within the new standard. In 1951, A325 bolts were recognized as equivalent to a hot driven ASTM A141 rivet.

Types

The type refers to the type of material used to make the bolt. The standard currently defines two types, however it previously defined the following three:
Type 1: Medium carbon steel, boron steel, or medium carbon alloy steel
Type 2: Low carbon martensitic steel (withdrawn from the standard in 1991)
Type 3: Weathering steel
There is also a T version, which is used to refer to fully threaded bolts.

Note that independent of the material the bolt is quenched and tempered.

Connection types

There are also three connection types defined:
SC: A slip critical connection.
N: A bearing type connection where the threads are on the shear plane.
X: A bearing type connection where the threads are not on the shear plane.

Mechanical properties

Mechanical properties, imperial
These types of bolts are designed to be tightened to near their proof strength, in order to create significant bolt tension. The standard states that the bolts must be tightened to at least 70% of the tensile yield strength. These bolts use the same material as their common cousins (ASTM F568M for metric bolts), but have a thicker and wider head to more effectively distribute the load. This modified geometry is often referred to as heavy hex geometry. Nuts must meet ASTM A563, which also uses heavy hex geometry. Dimensions of heavy hex geometry are per document ANSI/ASME B18.2.6, which uses “coarse” threads as defined by Unified Thread Standard.

ASTM 325 bolts can be considered equivalent to Grade 8.8 bolts according to ASTM F568M.

A325 Galvanized Heavy Hex Bolt

A325 Galvanized Heavy Hex Bolt

A325 Galvanized Heavy Hex Bolt Finish: Black, ZINC, Plain Material: Stainless Steel, Steel Standard: DIN Grade: 8.8 Surface treatment: Hot Dip Galvanized Type: Hex Bolts Nuts Thread: Fully Thread Application: Building Certificate: ISO9001:2008 Advantage of A325 Galvanized Heavy Hex Bolt: Galvanizing process: A layer of zinc is plated on the surface of the product for […]

Hexagonal Structural ASTM Heavy Hex Bolt

Hexagonal Structural ASTM Heavy Hex Bolt

Hexagonal Structural ASTM a325 a490 Heavy Hex Bolt Standard: ASME B 18.2.1,DIN6914 Size: 1/2”-1 1/2”,M12-M36 Material: Carbon Steel, Alloy Steel Grade: ASTM A325, A490,CL10.9 Thread: M, UNC, UNF Finish: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G. Packing: bulk in cartons (25kg Max.)+ wood Pallet or according to customer special demand Application: Structural Steel; Metal […]

Black Heavy Hex Bolt

Black Heavy Hex Bolt ASTM A325 A490

Black Heavy Hex Bolt ASTM A325 A490 High Tensile Bolts Finish: ZINC, Plain Material: Stainless Steel, Steel, Carbon Steel, Alloy Steel, Stainless Steel Certificate: ISO9001:2008 Surface treatment: Black size: 1/2″-4″, M5-M64 Grade: A307, A325, A490 Type: Heavy Hex bolt and nut All of the products widely used in automobiles, major engineering projects, mechanical engineering, petrochemical […]

High Strength Structural Heavy Bolt

ASTM A325 High Strength Structural Heavy Bolt

ASTM A325 High Strength Structural Heavy Bolt Material: Carbon Steel Finish: Black/ zincplated/ hot dipped galvanized Standard: DIN, ASTM, JIS, BS, AS,ISO, Nonstandard bolt (according to your order),etc. Grade: A325 or others Head: Hex Type: Structural Bolt Size: All size or by your drawing Packing: By carton, then by pallet High Strength Structural Heavy Bolt […]

High Tensile Black Heavy Hex Bolt

High Tensile Black Heavy Hex Bolt ASTM A325 A490 Bolts And Nuts

 ANSI A325 Heavy Hex Bolt, A307B Zinc Galvanized ASTM A325 A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ASTM A193 GR B7 Heavy Hex Bolt High Tensile Black Heavy Hex Bolt ASTM A325 A490 Standard No.: A325, A325m, A490, A490m, A193, etc Specification size: diameter m10-m52, length 25-500mm Surface treatment: Black Fastener manufacturer DOWEDO […]

Hex Heavy Bolt Hardware Fastener ASTM A325

Hex Heavy Bolt Hardware Fastener ASTM A325

High Strength Hex Head Bolt,Heavy Hex Bolt, Black Oxide Carbon Steel Hex Bolts Hex Heavy Bolt Hardware Fastener ASTM A325 Material: Carbon Steel;Stainless Steel;Alloy Steel Color: Zinc,Black,Yellow,HDG Standard: DIN/ANSI/JIS/ISO Size: 1/2”- 1-1/2” Packing: Bags, Carton+Pallet Hex Heavy Bolt Hardware Fastener ASTM A325 Used for building construction, electrical power industry…… Hex bolts are widely used, the […]

Galvanized Heavy Hex Bolt A325 Grade

Galvanized Heavy Hex Bolt A325 Grade

Galvanized Heavy Hex Bolt A325 Grade, American Standard Zinc Galvanized ASTM A325M A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ANSI ASTM A193 GR B7 Heavy Hex Bolt, High Tensile Bolts And Nuts industrial fasteners China Factory Galvanized Heavy Hex Bolt A325 Grade 1. Standard: ISO, JIS, GB, ANSI, BSW, DIN or non standard […]

Heavy Hex Bolt A325 Galvanized

Heavy Hex Bolt A325 Galvanized

Heavy Hex Bolt A325 Galvanized, American Standard Zinc Galvanized ASTM A325M A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ANSI ASTM A193 GR B7 Heavy Hex Bolt, High Tensile Bolts And Nuts industrial fasteners China Factory Heavy Hex Bolt A325 Galvanized 1. Standard: ISO, JIS, GB, ANSI, BSW, DIN or non standard as customize […]

Import and Domestic A325 Heavy Hex Bolts

Import and Domestic A325 Heavy Hex Bolts

Import and Domestic A325 Heavy Hex Bolts, American Standard Zinc Galvanized ASTM A325M A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ANSI ASTM A193 GR B7 Heavy Hex Bolt, High Tensile Bolts And Nuts industrial fasteners China Factory Import and Domestic A325 Heavy Hex Bolts 1. Standard: ISO, JIS, GB, ANSI, BSW, DIN or […]

American Standard A325 Heavy Hex Bolts

American Standard A325 Heavy Hex Bolts

American Standard A325 Heavy Hex Bolts, Zinc Galvanized ASTM A325M A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ANSI ASTM A193 GR B7 Heavy Hex Bolt, High Tensile ASTM A325/A490 Bolts And Nuts industrial fasteners China Factory 1.Name: American Standard A325 Heavy Hex Bolts 2.Size: M12-M36 3.Standard:ASTM A325 bolt 4.Material:carbon steel 5.Finish:Black/HDG/Zinc-Plated 5.Packing: Standard […]

Galvanized ASME A325 Heavy Hex Bolt

Galvanized ASME A325 Heavy Hex Bolt

Galvanized ASME A325 Heavy Hex Bolt, Zinc Galvanized ASTM A325M A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ANSI ASTM A193 GR B7 Heavy Hex Bolt, High Tensile ASTM A325/A490 Bolts And Nuts China Factory 1.Name: Galvanized ASME A325 Heavy Hex Bolt 2.Size: M12-M36 3.Standard:ASTM A325 bolt 4.Material:carbon steel 5.Finish:Black/HDG/Zinc-Plated 5.Packing: Standard export packing […]

ANSI A325 Heavy Hex Bolt

ANSI A325 Heavy Hex Bolt

ANSI A325 Heavy Hex Bolt, A307B Zinc Galvanized ASTM A325 A490 B7 B8 Heavy Hex Hexagon Head Bolt, Stock ASTM A193 GR B7 Heavy Hex Bolt, High Tensile Heavy Hex Bolt ASTM A325/A490 Bolts And Nuts China Supplier 1.Name: ANSI A325 Heavy Hex Bolt 2.Size: M12-M36 3.Standard:ASTM A325 bolt 4.Material:carbon steel 5.Finish:Black/HDG/Zinc-Plated 5.Packing: Standard export […]