stainless steel nylon lock nuts factory for DIN 985 and Custom Metric Orders
XZ Fastener manufactures stainless steel nylon lock nuts for machinery, automotive brackets, electrical equipment, marine hardware, and vibration-prone assemblies. Available in DIN 985, ISO 10511 style, UNC/UNF, and custom drawing requirements, these nuts use a nylon insert to create prevailing torque and help reduce loosening under dynamic load. Buyers can specify A2/304, A4/316, thread pitch, insert color, finish, packing, and inspection level. Stainless nylon lock nuts can be sourced with bolts, washers, and other fastener products for complete assembly purchasing.
Quick Specs
What Buyers Should Know Before Sourcing Stainless Steel Nylon Lock Nuts
Stainless steel nylon lock nuts, also called nylon insert lock nuts or Nyloc nuts, use a non-metallic insert at the top of the nut. During assembly, the mating bolt thread engages the nylon insert and creates prevailing torque. This helps resist loosening caused by vibration, repeated movement, or light impact, while still allowing practical installation with standard tools.
For metric orders, many buyers specify DIN 985 nylon lock nuts. High-temperature assemblies should be reviewed carefully because nylon inserts have temperature limits. For heat exposure, all-metal lock nuts may be a better option than nylon insert types.
Important Sourcing Checks
- Confirm low type DIN 985 or high type DIN 982 before quotation.
- Specify metric coarse, metric fine, UNC, or UNF thread clearly.
- Check whether the nylon insert color must be white, blue, black, or buyer-specific.
- Confirm whether prevailing torque testing is required for the order.
- Review working temperature, chemical exposure, and vibration conditions before selecting nylon insert lock nuts.
For assemblies exposed to movement, this guide to anti-loosening fasteners helps buyers compare nylon lock nuts, all-metal lock nuts, washers, thread lockers, and other fastening methods.
Common Purchasing Descriptions
Clear purchasing descriptions reduce back-and-forth during quotation and help the factory quote the correct body material, nylon insert, thread, inspection level, and packaging method.
- DIN 985 A2-70 stainless steel nylon lock nuts, M6-M20, metric coarse thread, white nylon insert, plain finish.
- DIN 982 A4-70 stainless steel high type nylon insert lock nuts, M8, M10, M12, passivated finish.
- 316 stainless steel nylon lock nuts, UNC thread, blue nylon insert, small box packing with buyer label.
- A2 stainless steel Nyloc nuts for machinery assembly, carton and pallet packing, thread gauge inspection required.
- Mixed stock order with stainless nylon lock nuts, flat washers, spring washers, and metric hex head bolts.
- Assembly package including DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts for distributor stock.
Detailed Specifications Table
| Specification Item | Typical Options | Purchasing Notes |
|---|---|---|
| Product Type | Nylon insert lock nut, Nyloc nut, prevailing torque lock nut, stainless lock nut | Confirm whether the order requires low type, high type, flange type, or a custom design. |
| Standard Reference | DIN 985, DIN 982, ISO 10511 style, ISO 7040 style, ASME inch style, custom drawing | Standard name should be supported by size, pitch, material, insert color, and finish details. |
| Size Range | Common metric sizes M3-M30; larger metric or inch sizes upon request | MOQ and lead time may vary for uncommon sizes, fine threads, and special insert colors. |
| Thread | Metric coarse, metric fine, UNC, UNF | State pitch clearly, especially for M10, M12, and inch-thread orders. |
| Nut Body Material | 304/A2 stainless steel, 316/A4 stainless steel, 316L stainless steel | A4/316 is recommended for marine, coastal, wet, and chloride-exposed applications. |
| Nylon Insert | PA66 nylon insert, white, blue, black, or custom color upon request | Confirm operating temperature and chemical exposure before selecting nylon insert lock nuts. |
| Property Class | A2-50, A2-70, A4-70, A4-80 | Match nut class with bolt material, torque requirement, and application load. |
| Finish | Plain, passivated, bright cleaned, lubricated, waxed, or special finish | Lubrication can help reduce stainless-on-stainless galling during tightening. |
| Inspection | Dimension check, thread Go/No-Go gauge, visual inspection, prevailing torque test if required | Inspection reports can be supplied according to order requirement. |
| Packaging | Bulk carton, inner bag, small box, carton with pallet, neutral label, buyer label | Include carton weight limit, barcode rules, pallet height, and warehouse receiving requirements. |
Material and Grade Explanation
A2 / 304 stainless steel is commonly selected for general machinery, indoor equipment, electrical enclosures, furniture hardware, and many light outdoor applications. It provides practical corrosion resistance and is widely available for standard DIN 985 and DIN 982 size ranges.
A4 / 316 stainless steel is preferred for marine, coastal, water treatment, food equipment, and chemical-adjacent environments where stronger corrosion resistance is required. If the assembly uses stainless bolts and washers, buyers should review material pairing and galling risk before confirming the order.
PA66 nylon inserts provide prevailing torque and help resist vibration loosening. The insert is not intended for high-temperature applications, so heat exposure should be discussed before placing an order.
Assembly Compatibility
For complete assemblies, review the bolt, nut, washer, material, finish, and thread together. This guide to matching stainless steel bolts, nuts, and washers is useful when preparing a full bill of materials for stainless fastening.
When vibration resistance is the key reason for choosing lock nuts, buyers can also compare joint conditions using this fastener vibration resistance guide.
Surface Finish Selection Guide
Stainless steel nylon lock nuts are often supplied plain or passivated because the stainless body provides the main corrosion resistance. Finish selection should also consider the mating bolt, assembly torque, storage environment, and cleanliness requirements.
| Finish Option | Suitable Use | Buyer Consideration |
|---|---|---|
| Plain Stainless | General stainless assemblies, indoor machinery, distributor stock | Common and practical for many DIN 985 lock nut orders. |
| Passivated Stainless | Outdoor, wet, marine-adjacent, and corrosion-sensitive assemblies | Helps improve surface condition after forming, tapping, handling, and cleaning. |
| Bright Cleaned | Visible hardware, clean assembly, retail or kit packing | Confirm appearance expectations and packing method before production. |
| Lubricated or Waxed | Stainless-on-stainless tightening where galling risk must be reduced | Confirm whether lubricant affects torque values, cleanliness, or customer requirements. |
| Carbon Steel Plated Alternatives | Cost-sensitive or indoor assemblies where stainless steel is not required | Zinc plated, black oxide, and hot dip galvanized options should be specified separately from stainless orders. |
If the order includes both stainless and carbon steel fasteners, keep material and finish labels separate to avoid mixing parts during receiving and installation.
Manufacturing and Quality Control
Stainless steel nylon lock nuts are typically produced by cold forming the stainless nut body, tapping the thread, inserting the nylon ring, cleaning the part, and completing final inspection. For special sizes, inch threads, or non-standard geometry, machining or customized tooling may be required. Insert retention, thread quality, and visual condition are important because the nylon insert must engage consistently with the mating bolt.
Quality control can include raw material verification, dimensional inspection, thread Go/No-Go gauge checking, insert position check, visual surface inspection, and prevailing torque testing when required. Buyers can review broader inspection points in this guide to fastener quality control.
Factory Inspection Points
- Thread runs smoothly before nylon insert engagement.
- Nylon insert is seated evenly and not cracked or loose.
- Across-flat, height, thread depth, and chamfer meet the confirmed standard or drawing.
- Prevailing torque is checked when requested by the buyer.
- Carton labels match size, material, insert color, finish, batch, and quantity.
- Packing avoids mixed sizes, mixed materials, or contaminated stainless surfaces.
Applications
Machinery and Equipment
Used on covers, guards, brackets, frames, adjustment points, and service panels where vibration can loosen standard nuts.
Automotive and Transport
Suitable for brackets, clamps, body hardware, and maintenance kits where repeatable anti-loosening performance is needed.
Marine and Outdoor Hardware
A4/316 stainless nylon lock nuts are commonly selected for moisture, coastal, and outdoor exposure when temperature is suitable.
Electrical Enclosures
Used for cabinet panels, mounting plates, grounding brackets, and stainless equipment hardware.
Construction Accessories
Applied in brackets, light frames, rail hardware, and assembled kits requiring stainless corrosion resistance.
Distributor Stock
Common metric and inch sizes can be supplied in bulk cartons, small boxes, bags, and buyer-labeled pallets.
How to Get a Faster Quotation
A complete inquiry helps the factory quote the correct lock nut type, insert, inspection level, packaging, and lead time without repeated clarification.
- Send the standard or drawing: DIN 985, DIN 982, ISO style, ASME style, or custom drawing.
- List the size and pitch: for example, M5, M6, M8, M10, M12, M16, UNC, or UNF.
- Confirm stainless grade and property class: A2-70, A4-70, A4-80, 304, 316, or 316L.
- State nylon insert color and whether prevailing torque testing is required.
- Provide quantity by size, including sample order, bulk order, or recurring stock demand.
- Share finish, passivation, lubrication, cleaning, or appearance requirement.
- Specify packaging: bulk carton, inner bag, small box, pallet, barcode, neutral label, or buyer label.
- Include inspection requirements such as thread gauge, dimensional report, material document, pre-shipment photos, or third-party inspection.
- For final pricing and production timing, contact XZ Fastener with your full size list and target packing method.
FAQ
Can stainless steel nylon lock nuts be supplied according to DIN 985?
Yes. Stainless steel nylon lock nuts can be supplied according to DIN 985, DIN 982, ISO-style dimensions, ASME inch style, or buyer drawings. Please confirm size, pitch, material, insert color, finish, and inspection requirement.
What is the difference between DIN 985 and DIN 982 nylon lock nuts?
DIN 985 is commonly used for low type nylon insert lock nuts, while DIN 982 is a higher type lock nut. Buyers should confirm the required standard because nut height affects assembly clearance and thread engagement.
Should I choose A2 or A4 stainless steel nylon lock nuts?
A2/304 is suitable for many general industrial and indoor uses. A4/316 is recommended for marine, coastal, wet, and chemical-adjacent environments where stronger corrosion resistance is required.
Are nylon lock nuts suitable for high-temperature applications?
Nylon insert lock nuts should be reviewed carefully for high-temperature applications because the insert has heat limits. For higher heat exposure, all-metal lock nuts may be a more suitable option.
Can stainless nylon lock nuts be supplied with matching bolts and washers?
Yes. Buyers often request stainless nylon lock nuts together with washers and bolts, including metric hex head bolts and DIN 933 full thread hex bolts. Providing the full size list helps confirm thread fit, material pairing, finish, and packaging.
What inspection can be requested for stainless steel nylon lock nuts?
Buyers can request dimensional inspection, thread Go/No-Go gauge checking, insert position inspection, visual inspection, material documents, and prevailing torque testing according to order requirement.
Send Your Stainless Steel Nylon Lock Nut Inquiry
For a faster quotation, send your size list, finish, quantity, packaging, and inspection requirements. If the lock nuts are part of a larger assembly, include the matching bolt standard, washer type, material grade, insert color, and packing details so XZ Fastener can review thread fit and supply conditions together.
Request a Quote from XZ Fastener
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