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This specification covers two types of quenched and tempered, steel, metric heavy hex structural bolts. The bolts are intended for use in structural connections. The bolts are furnished in sizes M12 to M36 inclusive. They are designated by type denoting chemical composition as follows: Type 1—Medium-carbon, carbon boron, medium carbon alloy, or alloy boron steel; and Type 3—Weathering Steel. Materials shall be tested and the individual grades shall conform to specified values of heat treatment, threading, hot-dip and mechanically coated zinc coatings, lubrication, secondary processing, chemical composition, mechanical properties such as hardness, tensile properties, and rotational capacity.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers two types of quenched and tempered, steel, metric heavy hex structural bolts having a minimum tensile strength of 830 MPa ( ).
1.2 The bolts are intended for use in structural connections. These connections are comparable to those covered under the requirements of the Specification for Structural Joints Using High-Strength Bolts, approved by the Research Council on Structural Connections; endorsed by the American Institute of Steel Construction and by the Industrial Fastener Institute.
1.3 The bolts are furnished in sizes M12 to M36 inclusive. They are designated by type denoting chemical composition as follows:
1.3.1 Type 1—Medium-carbon, carbon boron, medium carbon alloy, or alloy boron steel.
1.3.2 Type 2—Withdrawn in 2003.
1.3.3 Type 3—Weathering Steel.
1.4 This specification is applicable to metric heavy hex, structural bolts only.
1.5 Terms used in this specification are defined in Terminology .
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
Note 1: This specification is the metric companion to the inch pound Specification .
1.7 The following safety hazard caveat pertains only to the test methods portion, Section 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. , of this specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A490M Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints (Metric)
A563M Specification for Carbon and Alloy Steel Nuts (Metric)
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
D3951 Practice for Commercial Packaging
F436M Specification for Hardened Steel Washers (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
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
ASME StandardsB 1.13M Metric Screw Threads B 18.18.3M Inspection and Quality Assurance for Special Purpose Fasteners B 126.96.36.199M Metric Heavy Hex Structural Bolts B 18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products
ICS Number Code 21.060.10 (Bolts, screws, studs)
UNSPSC Code 31161614(Structural bolts )
ASTM A325M-14, Standard Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength (Metric), ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top