Material
Carbon Steel
Type
Nylon insert lock nut
Size Range
M3–M36
Surface Finish
Plain / Zinc / H.D.G
Class
6 / 8 / 10
Standard
DIN 985
Packaging
Carton / Pallet
MOQ
1 piece (sample)
Precision Manufacturing, Batch After Batch
From cold-heading raw steel wire to heat-treated finished bolts, every step runs under strict in-house process control — ensuring the dimensional accuracy and strength grade printed on every head marking.
Product Overview
Application Scenarios
Nylon insert lock nuts (DIN 985) carry a nylon collar at the top that grips the bolt thread, creating friction that resists loosening under vibration — widely used in automotive, machinery, appliances and any joint subject to movement. The nylon insert also gives a degree of sealing against moisture, and provides prevailing-torque locking without damaging the bolt thread.
Installation Notes
Run the bolt through until it bites into the nylon collar, then tighten to the specified torque. The bolt should fully engage and ideally protrude through the nylon. Note the temperature limit — the nylon insert is rated to about 120°C; use an all-metal lock nut above that. For safety-critical joints, fit a fresh nut each time to guarantee full locking force.
Material & Certification
Manufactured from carbon steel to property class 6, 8 or 10 per ISO 898-2 with a PA66 nylon insert, produced to DIN 985. Every batch is traceable to raw material certificates; each run passes 100% dimensional and locking-torque inspection; EN 10204 3.1 certificates available on request.
Nylon Insert Lock Nut
Carbon Steel Nylon Lock Nut · Class 6 / 8 / 10 · DIN 985
Dimensional Specifications
DIN 985 Standard Reference Dimensions — click a size to locate it below
| Thread Size | Width Across Flats s (mm) | Total Height m (mm) |
|---|---|---|
| M5 | 8 | 5.0 |
| M6 | 10 | 6.0 |
| M8 | 13 | 8.0 |
| M10 | 17 | 10.0 |
| M12 | 19 | 12.0 |
| M16 | 24 | 16.0 |
Reference dimensions per DIN 985 standard. Full size range M3–M36 available on request — contact us for custom specification sheets.
Applications
Construction
Steel structures, bridges, buildings, concrete anchors
Machinery
Heavy equipment, industrial machines, manufacturing
Infrastructure
Railways, towers, pipelines, power transmission
Automotive
Vehicle assembly, chassis, engine components
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Factory-direct nylon insert lock nuts exported to construction, machinery and infrastructure buyers across Europe, Africa, Asia and the Americas.