Grade 4.8/8.8/10.9/12.9 High-Quality DIN931 DIN933 Bolts And Nuts

Advantages: stainless steel 316L for non-standard and customized products. The gap between the nut and the screw is small, and the precision requirements are up to international standards. If required, the material certificate can be provided for customers.
Nut testing method: After the nut is tightened with the screw, shake the nut from side to side to feel the gap between them. If the gap is large, it is considered defective. The smaller the gap, the better, so as to check the rib precision of the screw.

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