The main products 1. GB (GB) family of fasteners, including by Dang Quan axis, hole by Dang Quan, Dang Quan open, wave-washer, saddle-shaped washer, spring dish washers, spring washers, conical washers, with teeth Washers, washer outside the tooth, with serrated lock washers, lock washers outside serrated, conical washers, stop ring, wire Dang Quan 2, and so on. Marked Germany (DIN) series fasteners, including DIN471, DIN472, DIN6799, DIN6798 , DIN6797, DIN6796 3. Fasteners copper series, including Dang Quan bronze, bronze wave washer, saddle-shaped bronze washer, both within and outside the bronze gear washer, gasket-bronze ... ... phosphor bronze with teeth washers, Phosphor bronze gear outside the washer, phosphor bronze washer ... ... copper washers, brass washer ... 4 .... Insulation pads series (plastic fasteners), including graphite gasket nylon, polyester film washers, nylon pads, red ( Black) steel pads of paper. Epoxy board pads, plastic pads, a variety of specifications set by customers since. 5. Stampings, stretching pieces of (non-standard) series, including the folder bearings, stampings, such as pieces of stretching, according to the drawings or samples of mold design and development for production and processing in order to meet customer requirements.