Nut commonly used national standard has the GB41 type Ⅰ hexagonal nut, class C ", "GB6170 type Ⅰ hexagonal nut, A and B level", "GB6171 Ⅰ type hexagonal nut, fine teeth, A and B level", "GB6172 hexagonal thin nut - A, B, chamfering, the thin GB6173 hexagonal nut - fine thread - A and B level";
The GB6174 hexagonal thin nut - B - no chamfer ", "GB6175 type Ⅱ hexagonal nut, A and B level", "GB6176 type Ⅱ hexagonal nut, fine thread - A and B level", "GB6177 hex flange surface nut, A level, the thick GB55 hexagonal nut, GB56 hexagonal ultra thick nut," big GB1229 hexagonal nut (steel structure with high strength).
Because of brittle fracture of hydrogen embrittlement, the occurrence of national standard nut is very sudden, we are not expected, so the consequences caused by this situation are often very serious. It is necessary to reduce the occurrence of hydrogen embrittlement, especially when safety is required. Therefore, it is very important to remove hydrogen embrittlement by plating nut. Above is our factory this time for you to introduce.