201/304/316 Stainless Steel Expansion Bolts
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Description
Stainless steel expansion bolts can be divided into seven types according to their types, which are as follows:
1.Metal expansion bolts (or called casing expansion bolts): is the most commonly used expansion bolts, according to the head shape is also divided into hexagonal head expansion screws, round head expansion screws, square head expansion screws, countersunk head expansion screws, etc.. It is a special threaded connection used to fix the air duct support,...