Product Parameters
| Item | Specification |
|---|---|
| Material | Carbon Steel, Stainless Steel (316, 18-8) |
| Nylon Insert | Polyamide (Nylon) insert |
| Thread | Metric (M3–M30), Imperial (1/4"–1-1/4") |
| Temperature | -50°C to +120°C |
| Application | Vibration environments, machinery, automotive |
| MOQ | 50 pcs |
description
Nylon insert lock nuts have a nylon ring at the top of the nut that grips the bolt thread when the nut is assembled - the nylon fills the thread voids and provides a frictional interference that prevents the nut from vibrating loose. The nylon insert is most effective against vibration-induced loosening, less effective against impact loosening. The nylon insert nut is the standard lock nut for most industrial applications - simpler and less expensive than prevailing torque nuts with distorting the top of the nut or using separate lock washers. The nylon insert does not significantly affect the thread torque-tension relationship, so the nut can be installed using normal torque specifications. 18-8 stainless (304) and 316 stainless insert nuts are used for corrosion resistance - the stainless nut with the nylon insert provides both the corrosion resistance of stainless and the locking function of the nylon insert. Carbon steel insert nuts are used where the extra strength of alloy steel is needed.
When Nylon Insert Nuts Actually Work
Nylon insert nuts work when the bolt is fully engaged and the nylon is compressed - hand-tight engagement does not activate the lock. If your assembly uses bottoming-out bolts or setscrew-style engagements where the thread does not pass fully through the nut, the nylon will not be compressed and the locking function will not work. Also: the nylon degrades with temperature and time. For permanent assemblies, fine. For assemblies that get disassembled repeatedly, the nylon grip weakens with each cycle.
FAQ
Q1: MOQ?
A1: 50 pieces for standard lock nuts.
Q2: Materials?
A2: Carbon steel, 18-8 stainless (304), 316 stainless.
Q3: Temperature range?
A3: -50°C to +120°C. Effectiveness reduced above +120°C.
Q4: Reusability?
A4: Limited. The nylon deforms during installation - performance degrades with reuse.
Q5: Vibration resistance?
A5: Effective against vibration loosening. Less effective against impact loosening.
Q6: Custom configurations?
A6: Yes. Custom sizes, materials, and special configurations.
Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.
- IATF 16949 - Automotive quality management system for safety-critical components
- PPAP / PPF - Production Part Approval Process documentation available on request
- AIAG Core Tools - APQP, FMEA, SPC, and MSA documentation on demand
- Passivation / Electropolishing - ASTM A967 procedures for corrosion resistance
- Material Traceability - Heat number tracking from raw material to finished part
From raw material to finished product, every step is controlled and documented:
- Wire / Bar Preparation - Cold heading or CNC blanking to near-net shape
- Thread Rolling / Cutting - Thread rolling for rolled threads or die cutting for cut threads
- Heat Treatment - Case-hardening or through-hardening for strength requirement
- Surface Treatment - Plating, coating, or passivation as specified
- Final Inspection - Dimensional check, torque testing, and surface inspection
- Packaging - Bulk bag, polybag, or plastic tub with labeling and traceability
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