ASTM A490-06 - 1.8.2006
 
1. Scope

1.1 This specification covers two types of quenched and tempered, alloy steel, heavy hex structural bolts having a tensile strength of 150 to 173 ksi.

1.2 These bolts are intended for use in structural connections. These connections are covered under the requirements of the Specification for Structural Joints Using Specification A 325 or A 490 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 1/2 to 11/2in., inclusive. They are designated by type denoting chemical composition as follows:
TypeDescription
Type 1Medium carbon alloy steel
Type 2Withdrawn in 2002
Type 3Weathering steel

1.4 This specification provides that heavy hex structural bolts shall be furnished unless other dimensional requirements are specified on the purchase order.

1.5 Terms used in this specification are defined in Terminology F 1789 unless otherwise defined herein.

1.6 For metric bolts, see Specification A 490M Classes 10.9 and 10.9.3

The following safety hazards caveat pertains only to the Test Methods portion, Section of this specification: 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.

 
2. Referenced Documents

F2328-17(2022)

Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, Studs, and Nuts

IFI?144

Test Evaluation Procedures for Coating Qualification Intended for Use on High-Strength Bolts

B1.1

Unified Screw Threads

B18.2.6

Fasteners for Use in Structural Applications

B18.24

Part Identification Number (PIN) Code System Standard for B18 Fastener Products

F1136-10

Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners

F1470-24

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

F1789-26

Standard Terminology for F16 Mechanical Fasteners

E1444-05

Standard Practice for Magnetic Particle Testing

F436-11

Standard Specification for Hardened Steel Washers

F606-14

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

E709-21

Standard Guide for Magnetic Particle Testing

F788/F788M-20(2025)

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

A194/A194M-26

Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both

A325-14

Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength (Withdrawn 2016)

A354-26

Standard Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners

A490M-14

Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints (Metric)

A563-15

Standard Specification for Carbon and Alloy Steel Nuts

A751-25

Standard Test Methods and Practices for Chemical Analysis of Steel Products

D3951-18(2023)

Standard Practice for Commercial Packaging

E384-22

Standard Test Method for Microindentation Hardness of Materials

F959-15

Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use with Structural Fasteners

F2833-11

Standard Specification for Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum Organic/Inorganic Type

G101-04(2025)

Standard Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels