AASHTO M 291M-2007
Standard Specification for Carbon and Alloy Steel Nuts [Metric] [Superseded: ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M, ASTM A563M REV A]