This part of GB/T 6172 specifies the type dimensions, requirements and designation of prevailing torque type hexagon thin nuts (with non-metallic insert).
This part is applicable to prevailing torque type hexagon thin nuts (with non-metallic insert) with threads of M3~M36, property classes of 04 and 05 and product grades of Grade A and Grade B. Grade A products are used for nuts with D less than or equal to 16mm; Grade B products are used for nuts with D greater than 16mm.
Note: The dimensions of the nuts correspond to those given in GB/T 6172.1 plus prevailing torque feature.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 9145 General Purpose Metric Screw Threads - Limits of Sizes for the Screw Threads of Medium Quality and Preferable Plan (GB/T 9145-2003, ISO 965-2:1998, MOD)
GB/T 16938 Fasteners - General Requirements for Blots, Screws, Studs and Nuts (GB/T 16938-2008, ISO 8992:2005, IDT)
3 Dimensions
See Figure 1 and Table 1.
Symbols and descriptions of dimensions shall meet those specified in GB/T 5276.
Foreword i 1 Scope 2 Normative References 3 Dimensions 4 Requirements and Reference Standards 5 Designation
