Hebei Kappa Metal Products Co., Ltd. is one of the most reliable manufacturers and suppliers of prevailing torque nut carbon steel 4.8 with blue nylon washer in China. Welcome to buy bulk high quality prevailing torque nut carbon steel 4.8 with blue nylon washer made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Drywall screws are not priced by quantity alone. Weight per piece has a direct effect on cost, especially for large orders. A small difference in screw weight can change the total tonnage and the final price.
Send us the details, drawing on my factory-floor experience, we can analyze your specific market conditions and store requirements to help you determine the most precise and appropriate pricing.e-no guesswork on weight.
Please specify:
01
- Diameter × length
- Head type (bugle head, countersunk, etc.)
02
- Thread type (fine or coarse)
- Coating (black phosphate, gray phosphate, zinc, etc.)
03
- Target weight per piece (g/pc)
- Order quantity
04
- Packaging (dimensions of the box/outer carton, package weight, and whether the logo style or color can be customized)
Product Specification
DIN 985 / DIN 982 Nylon Insert Lock Nut
DIN 985 Lock Nut, DIN 982 Lock Nut, Blue Nylon Insert, Zinc Plated Carbon Steel, Metric Thread, Vibration Resistant Fastener, Industrial Fasteners, Bulk Supply
|
Product Name |
Nylon Insert Lock Nut |
|
Standard |
DIN982/985 |
|
Material |
Carbon steel/Alloy Steel |
|
Finish/Surface treatment |
Zinc plated/Galvanized |
|
Nylon Insert Color |
Blue |
|
Size |
Diameter: M8,M10,M12,M14,M16,1/2",1/4"... |
|
Thread pitch |
1.5mm/2mm |
|
Measuring |
Metric/Inch |
How the Nylon Insert Helps Prevent Loosening
- Locking action-the nylon ring is compressed by the bolt thread as it passes through, creating continuous radial pressure on the threads. That pressure is what resists vibration loosening, not just surface friction.
- Thread engagement-the insert grips the mating thread along its full length, so the nut holds position even after repeated tightening and loosening cycles.
- Construction-steel body for load-bearing, nylon insert for locking, zinc plating for corrosion protection.
- Temperature limit-standard nylon inserts are good to about 120°C (check the specific grade). Above that, use an all-metal lock nut-nylon softens and loses locking force.
Applications & Working Conditions
Machinery and equipment assembly
Machine components, brackets, frames and metal parts, plus equipment installation and general bolted joints where vibration loosening is a concern.
01
Automotive and mechanical components
General mechanical assemblies under vibration. Not for safety-critical components without engineering approval.
02
Temperature limit
Standard nylon inserts are good to about 120°C (check the specific grade). Above that, use an all-metal lock nut-nylon softens and loses locking force.
03
Corrosion protection
Zinc plating (typically 5-8μm) suits indoor and sheltered outdoor use. For direct rain, salt spray or chemical exposure, specify hot-dip galvanizing or a zinc-flake coating.
04
Why Choose Us
Mixed sizes in one order
Combine different nut sizes and grades in a single PO, with one set of documents and one shipment.
Bolts and nuts sourced together
We supply the nut to the same standard and finish as your bolt, so you don't chase two suppliers for one connection.
Packaging to your channel
Bulk cartons, small bags or boxes, labeled cartons and pallets; tell us the label format and we'll match it.
Custom labels and shipping marks
Packaging labels, carton marks and shipping marks set up from your artwork or sample.
Export terms
EXW, FCA,FOB, CIF,DDP and other agreed terms, with export documents prepared for your destination.
Spec locked before production
Size, thread, finish and standard signed off on one spec sheet, so the batch matches what you ordered.
Custom Packaging&Private Label Available
Choose from bulk cartons, poly bags with branded labels, or retail-ready packaging. Minimum order quantities can be adjusted to support both small contractors and large-scale procurement needs.
We offer custom box/bags printing and labeling services to help you build your own product line.
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