US standard nylon insert lock nuts (Nylock nuts) comply with ASME B18.16.6, UNC coarse & UNF fine inch thread. Anti‑vibration self‑locking hex lock nuts for machinery, automotive and industrial fastening.

US Standard Nylon Insert Lock Nuts: Reliable Anti‑Loosening Solution For Inch‑Thread Assemblies

When mechanical equipment suffers from continuous vibration and impact, ordinary hex nuts tend to gradually loosen, bringing hidden risks to the whole assembly. US standard lock nuts (nylon insert lock nuts, also known as Nylock nuts) are widely‑used prevailing‑torque self‑locking fasteners specially designed for inch‑thread American standard bolts, solving the loosening problem caused by long‑term vibration efficiently.

These US standard nylon insert lock nuts follow ASME B18.16.6‑2017 inch‑series prevailing torque locknut standard. Two mainstream thread types are available: UNC (Unified National Coarse, coarse thread) and UNF (Unified National Fine, fine thread), fully matching US‑spec inch bolts and screws. Common sizes cover #6‑32, #8‑32, #10‑24, 1/4‑20, 5/16‑18, 3/8‑16, 1/2‑13 and larger inch specifications.

• Material：Carbon Steel Grade2/Grade8 / Stainless Steel304/316
• Surface：Zinc Plated
• Standard：ASME B18.16.6‑2017
• Thread：UNC(Coarse),UNF(Fine)
• Type：Nylon Insert Prevailing Torque Lock Nut
• Size：#6‑32 up to 1‑8 inch
• Application：Automotive, machinery, equipment exported to North America