ASTM A307-07a - 1.8.2007
 
1. Scope

1.1 This specification covers the chemical and mechanical requirements of three 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:

1.1.1 The term studs includes stud stock, sometimes referred to as threaded rod.

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 A 563. Unless otherwise specified, the grade and style of nut for each grade of fastener, of all surface finishes, shall be as follows:

1.4 The values stated in inch-pound units are to be regarded as the 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 F 1789 unless otherwise defined herein.

 
2. Referenced Documents

B?18.24

Part Identifying Number (PIN) Code System Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://www.asme.org.

F1470-24

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

F788/F788M-20(2025)

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

F606-14

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

B695-21

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

A751-25

Standard Test Methods and Practices for Chemical Analysis of Steel Products

A706/A706M-26

Standard Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement

A563-15

Standard Specification for Carbon and Alloy Steel Nuts

B18.31.3

Threaded Rods (Inch Series)

F2329-13

Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners

B?1.1

Unified Screw Threads Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

B?18.2.1

Square and Hex Bolts and Screws

F1554-20

Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength

F1789-26

Standard Terminology for F16 Mechanical Fasteners