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1.1 This specification covers the chemical and mechanical requirements of quenched and tempered steel bolts, in nominal thread diameters M16 to M36, inch. These bolts are intended for use in structural joints that are comparable to those made under the Specification for Structural Joints Using ASTM A325 or A490 Bolts issued by the Research Council on Structural Connections of the Engineering Foundation. The various types of bolts covered by this specification are:
1.1.1 Type 1- Bolts made of alloy steel, supplied in nominal thread diameters M16 to M36, inclusive.
1.1.2 Type 2- Bolts made from what is generally described as low-carbon martensite steel, supplied in nominal thread diameters M16 to M24 inclusive.
1.1.3 Type 3- Bolts in nominal thread diameters M16 to M36, inclusive, having atmospheric corrosion resistance and weathering characteristics comparable to that of the steels covered in Specifications A588/A588M, A242/A242M, and A709/A709M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition. See 6.3. When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.
1.2 Unless otherwise specified, all nuts used on these bolts shall conform to the requirements of Specification A563M, shall be heavy hex, and shall be of the class and surface finish for each type of bolt as follows:Bolt Type and Finish Nut Class and Finish 1 and 2, plain (noncoated) 10S, 1053, plain 3, plain 10S3, plain
1.3 Unless otherwise specified, all washers used on these bolts shall conform to the requirements of Specification F436M and shall be of a surface finish for each type of bolt as follows:Bolt Type and Finish Washer Finish 1 and 2, plain (uncoated) plain (uncoated) 3, plain weathering steel, plain
1.4 This specification provides that heavy hex structural bolts and heavy hex nuts shall be furnished unless other dimensional requirements are stipulated in the purchase inquiry and order.Note 1-For quenched and tempered steel bolts, studs, and other externally threaded fasteners with nominal thread diameters larger than M36, but with similar mechanical properties, refer to class 10.9 of Specification F568. Note 2-This specification is the metric companion of Specification A490.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A325 Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength
A490 Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength
A490M Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength
A563M Specification for Carbon and Alloy Steel Nuts (Metric)
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
D3951 Practice for Commercial Packaging
E384 Test Method for Knoop and Vickers Hardness of Materials
E709 Guide for Magnetic Particle Testing
E1444 Practice for Magnetic Particle Testing
F436M Specification for Hardened Steel Washers (Metric)
F568M Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners (Metric)
F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets (Metric)
F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
F959M Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners (Metric)
F1136M Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners (Metric)
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1789 Terminology for F16 Mechanical Fasteners
F2328M Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, Studs, and Nuts (Metric)
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 StandardsB1.13M Metric Screw Threads B184.108.40.206M Metric Heavy Hex Structural Bolts B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products
ISO Standards7412 Hexagon Bolts for High Strength Structural Bolting With Large Width Across Flats (Short Thread Length)-Product Grade C-Property Classes 8.8 and 10.9
IFI StandardIFI 144 Test Evaluation Procedures for Coating Qualification Intended for Use on High-Strength Structural Bolts
ICS Number Code 21.060.10 (Bolts, screws, studs)
UNSPSC Code 31161614(Structural bolts)
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ASTM A490M-00, Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints [Metric], ASTM International, West Conshohocken, PA, 2000, www.astm.orgBack to Top