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Round head hardware bolt standards from ASME, ISO, and others address bolts, their quality and construction, and their different forms. A popular standard listed here is ASME B18.5.2.1M for metric round head bolts, which covers the general and dimensional data for metric hex bolts recognized as American National Standard. These ANSI bolt standards have been recognized worldwide across hardware manufacturing and construction bodies alike. Find the standard that can best help your practice here.
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.
This standard covers the complete general and dimensional data for metric series round head ribbed neck bolts in sizes M5 thru M14, intended for general engineering applications.