This standard specifies non-metallic insert hexagonal flange lock nuts with thread specifications M5~M20, performance grades 8, 9 and 10, and product grades A and B. Grade A is used for D≤16mm; Grade B is used for nuts with D>16mm. For the inspection of hexagon and flange, see Appendix A (standard appendix). Note: This kind of nut is equivalent to GB/T 6177.1 plus the effective torque part. If other technical requirements are required, they should be selected from current standards (such as GB/T 196, GB/T 3098.9 and GB/T 3103.1).
GB/T 6183.1-2000 history
2016GB/T 6183.1-2016 Prevailing torque type hexagon nuts with flange (with non-metallic insert) , style 2
2000GB/T 6183.1-2000 Prevailing torque type hexagon nuts with flange(with non-metallic insert)