... : 1. by components Bolts, Screw bolts/Studs, Nuts, Tapping screws, Wooden screws, Washers/Gaskets, Check rings, Pins, Rivets and etc. 2 ... fastener products are wildly used in cameras, glasses, timekeepers, televisions, musical instruments, furniture, electronic equipments, projects, constructions, Bridges, traffic appliances and so ...