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ASTM A325 Bolts
The ASTM A325 specification covers high strength heavy hex structural bolts from ½” 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 thread lengths and other related dimensions.

Detailed Product Description


Standard: ASTM A325/Din933 hex bolts
Dia.: 1/2""-1 1/2"";
Length:1 1/4""-8"";
Surface treatment: Plain ,Black oxygenation, HDG

Scope
The ASTM A325 specification covers high strength heavy hex structural bolts from ½” 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 thread lengths and other related dimensions.
This specification is applicable to heavy hex structural bolts only. For bolts of other configurations and thread lengths with similar mechanical properties, see Specification A 449.
Bolts for general applications, including anchor bolts, are covered by Specification A 449. Also refer to Specification A 449 for quenched and tempered steel bolts and studs with diameters greater than 1-1/2"" but with similar mechanical properties.
Types


 TYPE 1
Medium carbon, carbon boron, or medium carbon alloy steel.
 TYPE 2
Withdrawn November 1991.
 TYPE 3
Weathering steel.
 
T
Fully threaded A325. (Restricted to 4 times the diameter in length)
M
Metric A325.


Connection Types
Mechanical Properties


Size
Tensile, ksi
Yield, ksi
Elong. %, min
RA %, min
1/2 - 1
120 min
92 min
14
35
1-1/8 - 1-1/2
105 min
81 min
14
35
Recommended Nuts and Washers


Nuts
Washers
Type 1
Type 3
Type 1
Type 3
Plain
Galvanized
Plain
A563C, C3, D, DH, DH3
A563DH
A563C3, DH3
F436-1
F436-3
Note: Nuts conforming to A194 Grade 2H are a suitable substitute for use with A325 heavy hex structural bolts. The ASTM A563 Nut


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