1.1 this specification covers chemical and mechanical requirements for eight grades of carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts. NOTE 1-See Appendix X1 for guidance on suitable application of nut grades. 1.2 the r...

1.1 This specification covers zinc coatings applied by the hot-dip process on iron and steel hardware. 1.2 This document is intended to be applicable to hardware items that are centrifuged or otherwise handled to remove excess galvanizing bath metal (free zinc). Coating thickness grade requiremen...

This standard is intended to cover the complete general and dimensional data for the various types of slotted and recessed head machine screws and machine screw nuts recognized as American National Standard. Also included are appendixes that provide specifications and instructions for the protrus...

This standard specifies dimensions and technical delivery conditions for square taper washers for use in structural bolting of steel channel sections using bolts up to property class 5.6.

This Standard specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads. (In order to emphasize that unified screw threads are based on inch modules, they may be denoted unified inch screw threads.) Several variations in thread form have been develo...

This Japanese Industrial Standard specifies limit of sizes and tolerances for metric trapezoidal screw threads specified in JIS B 0216. The limit of sizes and tolerances due to this standard do not apply to those with special requirements for axial displacement, for example, for lead screw.