Standard Specification for High-Strength Steel Bolts, Classes 10.9 and
10.9.3, for Structural Steel Joints (Metric) 1
This standard is issued under the fixed designation A490M; the number immediately following the
designation indicates the year of original adoption or, in the case of revision, the year of last revision.
A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an
editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
Medium carbon alloy steel in accordance with ASTM A490M
Materials & Manufacture ASTM A490M
Finish Self Colour / Black ASTM A490M
Mechanical Properties ASTM A490M
Dimensions & Tolerances ASME B18.2.3.7M
Threads ASME B1.13M tolerance class 6g
Workmanship ASTM F788 / F788M
Magnetic Particle Inspection ASTM A490M
Product Marking ASTM A490M
Nominal Length Length Tolerance
Up to and including 50 ± 1.2
Over 50 up to and including 80 ± 1.5
Over 80 up to and including 120 ± 1.8
Over 120 up to and including 150 ± 2.0
Over 150 ± 4.0
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