AASHTO M 291-06 is identical to ASTM A563-04a except provisions specified in this document.
AASHTO M 291-09
Original price was: $148.00.$74.00Current price is: $74.00.
Standard Specification for Carbon and Alloy Steel Nuts (ASTM Designation: A 563-07)
American Association of State Highway and Transportation Officials , 2009