ASME B18.5.2.1M-2006 (R2011)

This Standard covers the general and dimensional data for metric series round head short square neck bolts recognized as American National Standard and intended primarily for applications in thin metals. The inclusion of dimensional data in this Standard is not intended to imply that all sizes described are production stock items. Consumers should consult with suppliers concerning lists of stock production items. Round head short square neck bolts purchased for government use shall conform to this Standard and, additionally, to the requirements of Appendix A.