1.1 This specification2 covers the chemical and mechanical requirements of two grades of carbon steel bolts and studs in sizes 1⁄4 in. through 4 in. The fasteners are designated by “Grade” denoting tensile strength and intended use, as follows: Grade Description Grade A Bolts, studs, and threaded rod having a minimum tensile strength of 60 ksi and intended for general applications, Grade B Bolts, studs, and threaded rodA having a tensile strength of 60 to 100 ksi and intended for flanged joints in piping systems with cast iron flanges, and Grade C Replaced by Specification F1554 Gr.36 A Threaded rod is not usually produced to Grade B, but can be when specified by the purchaser.
1.2 This specification does not cover requirements for machine screws, thread cutting/forming screws, mechanical expansion anchors or similar externally threaded fasteners.
1.3 Suitable nuts are covered in Specification A563. Unless otherwise specified, the grade and style of nut for each grade of fastener, of all surface finishes, shall be as follows: Fastener Grade and Size Nut Grade and StyleA A 1⁄4 to 11⁄2 in. A, hex A over 11⁄2 to 4 in. A, heavy hex B, 1⁄4 to 4 in. A, heavy hex A Nuts of other grades and styles having specified proof load stresses (Specification A563, Table 3) greater than the specified grade and style of nut are also suitable.
1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 Supplementary Requirement S1 of an optional nature is provided, which describes additional restrictions to be applied when bolts are to be welded. It shall apply only when specified in the inquiry, order, and contract.
1.6 Terms used in this specification are defined in Terminology F1789 unless otherwise defined herein.
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.
ASTM A307-14e1 Referenced Document
ASTM A563 Standard Specification for Carbon and Alloy Steel Nuts*, 2024-04-22 Update
ASTM A706/A706M Standard Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement*, 2022-12-01 Update
ASTM A751 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
ASTM B695 Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel*, 2021-11-01 Update
ASTM F1470 Standard Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection*, 2024-01-26 Update
ASTM F1554 Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength
ASTM F1789 Standard Terminology for F16 Mechanical Fasteners*, 2023-11-01 Update
ASTM F2329 Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners*, 2024-04-22 Update
ASTM F606 Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets
ASTM F788/F788M Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
ASTM A307-14e1 history
2021ASTM A307-21 Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
2014ASTM A307-14e1 Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
2014ASTM A307-14 Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60000 PSI Tensile Strength
2012ASTM A307-12 Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
2010ASTM A307-10 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2007ASTM A307-07b Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2007ASTM A307-07a Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2007ASTM A307-07 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2004ASTM A307-04e1 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2004ASTM A307-04 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2003ASTM A307-03 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2002ASTM A307-02 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
2000ASTM A307-00 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
1997ASTM A307-97 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strangth
1978ASTM A307-78 Standard Specification for Carbon Steel Externally Threaded Standard Fasteners