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Handan Yongnian Xuchang Fastener Manufacturing Co., Ltd.
Hex nuts Lock nuts Precision rolled nuts Irregular nuts Large size nut Customized non-standard nuts -
Ruian Huadeli Standard Parts Co., Ltd.
Double ended studs Hex bolts Hex nuts Round nuts Non-standard fasteners -
Jiangsu Yisu Spring Technology Co. Ltd./Wuxi Yisu Hardware Electromechanical Co., Ltd.
Disc spring washers Spiral spring washers Annular spring washers Compression spring washers Mould spring washers