Nut, Bolt, Screw manufacturer / supplier in China, offering 25-Piece Industrial Bulk Packing Cost-Effective Automated Assembly Line Just-in-Time Delivery Supply Locking Nut, 12.9 Grade Alloy Steel Highest Tensile Strength Socket Cap Head DIN 981 Security Critical Application Locking Nut, Black Oxide Coated Carbon Steel Prevailing Torque Flange Serrated Base DIN 981 High Vibration Resistance Locking Nut and so on.