Manufacturers should produce performance level codes and manufacturer (or distributor) identification marks on fastener products. Otherwise, it should be treated as unqualified products.
On each fastener product sold, make your own identification mark according to standard requirements, indicating that you are willing to take permanent responsibility for the quality of your products and reflecting the integrity of the enterprise!
The header applied by our company is the character "K" or "Wang", both of which are our products. If there are counterfeit products in the market, please feel free to report them.