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    ASTM F3148 - 17a

    Standard Specification for High Strength Structural Bolt Assemblies, Steel and Alloy Steel, Heat Treated, 144ksi Minimum Tensile Strength, Inch Dimensions

    Active Standard ASTM F3148 | Developed by Subcommittee: F16.02

    Book of Standards Volume: 01.09


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    1. Scope

    1.1 This specification covers chemical, dimensional, physical and mechanical requirements for quenched and tempered bolts manufactured from steel and alloy steel, in inch dimensions. The bolts are available as structural bolting assemblies which include a fixed spline bolt, a suitable nut and at least one washer covered by reference herein.

    1.2 Intended Use: 

    1.2.1 Bolts manufactured under this specification, and structural bolting assemblies supplied under this specification, are intended for use in structural connections covered in the Specification for Structural Joints Using High-Strength Bolts and installed using the torque-and-angle or part turn/combined installation method.

    1.2.2 Structural bolting assemblies in this specification are furnished in nominal diameters from 1/2 to 1-1/4 in. inclusive.

    1.3 Classification: 

    1.3.1 Structural bolting assemblies are designated as Grade 144.

    1.3.2 Bolts are designated by type denoting raw material chemical composition.

    Type 1 -

    144ksi - carbon steel, carbon boron steel, alloy steel or alloy steel with boron addition

    Type 3 -

    144ksi - weathering steel

    1.4 Terms used in the specification are defined in Terminology F1789.

    1.4.1 Torque-and-Angle Fixed-Spline Structural Bolt—bolt that includes an integral fixed-spline end which extends beyond the threaded portion of the bolt and is used as a component of a torque-and-angle fixed-spline structural bolting assembly.

    1.4.2 Torque-and-Angle Fixed-Spline Structural Bolting Assembly2 a fastener assembly comprised of a torque-and-angle fixed-spline bolt with a suitable nut and at least one washer, installed and tightened using a special electric wrench and socket system which has an inner socket that engages the fixed-spline end of the bolt and with an outer socket that engages and turns the nut, in two separate and distinct operations, the first is a controlled torque application and the second is a specified angle.

    1.4.3 Combined Method—A tightening method comprised of two steps, the first tightening step using a torque regulating tool and the second tightening step in which a specified turn is applied to the turned part of the assembly. Also known as the ‘part turn method’.

    1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    1.6 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

    1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A563 Specification for Carbon and Alloy Steel Nuts

    A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

    B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

    E709 Guide for Magnetic Particle Testing

    E1444/E1444M Practice for Magnetic Particle Testing

    F436/F436M Specification for Hardened Steel Washers Inch and Metric Dimensions

    F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets

    F788 Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series

    F1136/F1136M Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners

    F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection

    F1789 Terminology for F16 Mechanical Fasteners

    F2328 Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, Studs, and Nuts

    F2833 Specification for Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum Organic/Inorganic Type

    G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels

    ASME Standards

    B 18.2.6 Fasteners for Use in Structural Applications


    ICS Code

    ICS Number Code 21.060.10 (Bolts, screws, studs)

    UNSPSC Code

    UNSPSC Code 31161627(Bolt assembly)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/F3148-17A

    Citation Format

    ASTM F3148-17a, Standard Specification for High Strength Structural Bolt Assemblies, Steel and Alloy Steel, Heat Treated, 144ksi Minimum Tensile Strength, Inch Dimensions, ASTM International, West Conshohocken, PA, 2017, www.astm.org

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