Manufacturers should produce performance level codes and manufacturer (or distributor) identification marks on fastener products. Otherwise, it should be treated as unqualified products.
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We often encounter customers who claim to have screws made in the American system, even though they are in the British system. What is the difference between the two before?
Has stainless steel rusted after using it for a while? It's really frustrating. Besides encountering counterfeit materials, will stainless steel itself rust?
Why is it unnecessary to galvanize the screws of 304 stainless steel German style hose clamps?
The Impact of Torque Transfer Capability on the Durability of Hexagon Socket Screws
Hexagon Socket Screws