scope:

This standard covers the complete general and dimensional data for metric heavy hex screws recognized as American National Standard.

The inclusion of dimensional data in this standard is not intended to imply that all of the sizes in conjunction with the various options described herein are stock items. Consumers are requested to consult with manufacturers concerning lists of stock production heavy hex screws.

Heavy hex screws purchased for Government use shall conform to this standard, and additionally to the requirements of Appendix III.