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Locknuts and self-tightening nuts are common fastening locknuts. Name Nylon Insert Locknut Prevailing Torque Type Hexagon Thin Nuts Self-Locking Hexagon Nuts Standard GB /T 889 GB /T 6182 ISO 7040 ASME B 18.16.6 Specification M5～M64 Size 1/4～4 Grade 4.8 5.8 6.8 8.8 10.9 12.9 Material Carbon steel、Stainless steel、355 35K 45# Surface black, zinc plated, color zinc, hot dipped galvanized, dacromet Description Locknuts and self-tightening nuts are common fastening locknuts. Construction operation technology The special engineering plastic is permanently attached to the thread, so that the internal and external threads in the process of shrinkage, engineering plastic is squeezed and produce a strong reaction force, greatly increasing the friction between the internal and external threads, providing absolute resistance to vibration. Scope of application Now commonly used self-locking anti-loose threaded fasteners mainly include: 2, the use of a variety of self-locking bolts or ring groove rivet to achieve self-locking; 3. Various spring washers are installed in the thread connection pair to realize thread self-locking; 4. Apply glue to the thread to realize self-locking. Keywords: Fasten the screw nut