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Nylon Insert Lock Nut (Nyloc Nut) — A prevailing torque type lock nut featuring a non-metallic nylon/polyamide insert at the top of the nut. When threaded onto a bolt, the nylon insert elastically deforms around the mating threads, creating friction that prevents loosening from vibration, shock, and dynamic loads. Manufactured from carbon steel (Class 6/8/10, Grade 2/5/8), stainless steel (304/A2-70, 316/A4-80), and alloy steel. Available in metric (DIN 982/985, ISO 7040/10511) and inch (UNC/UNF, ASME B18.16.6) standards. Widely used in automotive assemblies, heavy machinery, agricultural equipment, and any application requiring reliable vibration-resistant fastening without thread-locking compounds.
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