This standard specifies the basic profile for general purpose metric screw threads.
This standard is applicable to general-purpose mechanically fastened screw joints, of which the threads do not have the sealing function.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 14791 Screw threads - Vocabulary (neq ISO 5408: 1983)
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 14791 apply.
4 Basic profile
The basic profile shall comply with the requirements of Figure 1. The basic profile is shown as a thick line in the figure.
5 Dimensions
The dimensions of the basic profile for general purpose metric screw threads shall be calculated using the following formulas. See Table 1 for the specific dimensions.
