ASTM International

Standard Specification for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and 150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions
 N F3125/F3125M REV A

Annotation

This specification covers chemical, physical and mechanical requirements for quenched and tempered bolts manufactured from steel and alloy steel, in inch and metric dimensions, in two strength grades, two types and two styles.

This specification is a consolidation and replacement of six ASTM standards, including; A325, A325M, A490, A490M, F1852 and F2280.

This consolidated standard is to ensure alignment between standards with the same intended end use and to simplify the use and maintenance of structural bolt specifications.

Intended Use:

Bolts manufactured under this specification are intended for use in structural connections covered in the Specification for Structural Joints Using High-Strength Bolts, as approved by the Research Council on Structural Connections.

Bolts in this specification are furnished in sizes from 1?2 to 1-1?2 in. inclusive and from M12 to M36 inclusive.

Classification:

Bolts are designated by grade or property class, which indicates inch or metric respectively.

Bolts are designated by type denoting raw material chemical composition.

Bolts are designated by style denoting Heavy Hex bolts or “Twist-Off” Style assemblies.

Terms used in this specification are defined in F1789.

Units—The values stated in either SI units or inch pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.