1.1.1 This Standard covers the complete general and dimensional data for products in the metric series recognized as AmericanNationalStandard forsizes M12 through M36. These four metric structural products include
(a) metric heavy hex structural bolts: ASTM A325M and ASTM A490M
(b) metric heavy hex nuts: ASTM A563M
(c) metric hardened steel washers; circular, circular clipped, and beveled: ASTM F436M
(d) metric compressible washer-type direct tension indicators: ASTM F959M
