Standard Specification for
Carbon and Alloy Steel Nuts [Metric]
AASHTO Designation: M 291M-07
ASTM Designation: A 563M-06
AASHTO M 291M-07 is identical to ASTM A 563M-06 except for the following provisions:
1. All references to the ASTM standards contained in ASTM A 563M-06, listed in the following table, shall be replaced with the corresponding AASHTO standard:
Referenced Standards
ASTM AASHTO
A 153 M 232M/M 232
A 194/A 194M M 292M/M 292
A325 Ml64M
A490M M253M
A 709/A 709M M270M!M270
B 695 M298
2. Replace Note 3 of ASTM A 563M-06 with the following:
Note 3-This specification is the metric counterpart of AASHTO M 291.
- Replace Section 3.1.7 of ASTM A 563M-06 with the following:
3 .1. 7 AASHTO designation and year of issue, and
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