scope:

This standard covers material and performance requirements applicable to Type TR (thread rolling) tapping screws, heat treated to achieve properties comparable to GM500M (9.8) metric screws and GM275M inch screws with induction hardened points, in sizes 5 mm (No. 10 inch) and larger, which are suitable for use in general engineering and structural attachments.

Note: This specification is intended to supersede the following GM specifications. GM6171M (a) for metric Type TR tapping screws in the 5 through 14 mm sizes GM6010M for Type TT tapping screws of 5/16 to 18 inch and larger sizes.