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1.1 This specification covers the chemical and mechanical requirements of three grades of carbon steel bolts and studs in sizes 1/4 in. (6.35 mm) through 4 in. (104 mm). The fasteners are designated by "Grade" denoting tensile strength and intended use, as follows:Grade Description Grade A Bolts and studs having a minimum tensile strength of 60 ksi (414 MPa) and intended for general applications, Grade B Bolts and studs having a tensile strength of 60 to 100 ksi (414 to 690 MPa) and intended for flanged joints in piping systems with cast iron flanges, and Grade C Nonheaded anchor bolts, either bent or straight, having properties conforming to Specification A 36 (tensile strength of 58 to 80 ksi (400 to 550 MPa)) and intended for structural anchorage purposes.
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 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 Style A A, C, 1/4 to 1 1/2 in. A, hex A, C, over 1 1/2 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 A 563, 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 the standard. The values given in parentheses are for information only.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
F1554 Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength
F1789 Terminology for F16 Mechanical Fasteners
F2329 Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
ASME StandardsB 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 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. B18.31.3 Threaded Rods (Inch Series)
ICS Number Code 21.060.10 (Bolts, screws, studs)
UNSPSC Code 31161600(Bolts); 31163300(Studs)
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ASTM A307-00, Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength, ASTM International, West Conshohocken, PA, 2000, www.astm.orgBack to Top