Stainless Nylon Insert Lock Nuts
| Standard | DIN 985 / 982 · ISO 10511 / ISO 10512 |
|---|---|
| Material | SS304 / SS316 with Nylon Insert |
| Strength Grade | A2-70 / A4-80 |
| Size Range | M3-M24 |
| Surface Treatment | Passivation |
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Product Description
Product Description & Key Specifications
DIN 985 / DIN 982 stainless nylon insert lock nuts are supplied in SS304 / SS316 with nylon insert for corrosion-resistant assemblies that need prevailing-torque locking. Common supply range is M3-M24 with passivated stainless body and matching stainless bolts or flat washers on request.
Nylon insert lock nuts, also called stainless nyloc nuts, resist loosening by creating friction between the nylon insert and the bolt thread. They are useful for vibration-resistant service where temperature, chemicals and reuse expectations are compatible with nylon insert performance.
SS304 / A2 nylon lock nuts suit general outdoor stainless assemblies, while SS316 / A4 is preferred for marine, coastal, washdown and chloride-exposed environments. For high-temperature joints, chemical exposure or critical preload control, confirm whether nylon insert lock nuts are approved by the project standard.
| Product type | Stainless nylon insert lock nuts / stainless nyloc nuts |
|---|---|
| Standards | DIN 985 / DIN 982 / ISO 10511 / ISO 10512 reference |
| Material | SS304 / SS316 body with nylon insert |
| Strength grade | A2 / A4 stainless, matched to A2-70 / A4-80 bolt assemblies when specified |
| Size range | M3-M24, with thread pitch confirmed by order |
| Common models | M5, M6, M8, M10, M12, M16 stainless nylon insert lock nuts |
| Surface finish | Passivated stainless body |
| Supply form | Lock nuts only or matched bolt-washer-lock nut sets |
| Documentation | CoC, material certificate and dimensional report on request |
Dimensions & SpecificationsDIN 985 / ISO 10511
Technical Drawing
Dimensional Table
| Parameter | M3 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | 24 | M24 | 25 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | 174 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.5 | 0.7 | 0.8 | 1 | 1 | 1|1.25 | 1|1.25|1.5 | 1.25|1.5|1.75 | 1.5|2 | 1.5|2 | 1.5|2|2.5 | 1.5|2|2.5 | 1.5|2|2.5 | 0.4 | 2|3 | 0.45 | 2|3 | 2|3.5 | 2|3.5 | 3|4 | 3|4 | 3|4.5 | 3|4.5 | 3|5 | 0.6 |
| e/min | 6.01 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 | 29.56 | 32.95 | 35.03 | — | 39.55 | — | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 72.09 | 76.95 | 82.6 | — |
| h/max | 4 | 5 | 5 | 6 | 7.5 | 8 | 10 | 12 | 14 | 16 | 18.5 | 20 | 22 | — | 24 | — | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | — |
| h/min | 3.7 | 4.7 | 4.7 | 5.7 | 7.14 | 7.64 | 9.64 | 11.57 | 13.3 | 15.3 | 17.66 | 18.7 | 20.7 | — | 22.7 | — | 25.7 | 28.7 | 31.4 | 34.4 | 37.4 | 40.4 | 43.4 | 46.4 | — |
| k/min | 2.4 | 2.9 | 3.2 | 4 | 4.7 | 5.5 | 6.5 | 8 | 9.5 | 10.5 | 13 | 14 | 15 | — | 15 | — | 17 | 19 | 22 | 25 | 27 | 29 | 32 | 36 | — |
| s/max | 5.5 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 | 27 | 30 | 32 | — | 36 | — | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | — |
| s/min | 5.32 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | 26.16 | 29.16 | 31 | — | 35 | — | 40 | 45 | 49 | 53.8 | 58.8 | 63.8 | 68.1 | 73.1 | — |
Engineering references
Technical resources
Review the applicable dimensions, drawing and standard relationship before confirming the ordered specification.02
Selection
Selection Advantages by Application
Solar PV Mounting Systems
M8, M10 and M12 stainless nylon insert lock nuts are commonly used for selected PV brackets, clamps and accessory assemblies where vibration resistance is needed and service temperature allows nylon insert use.
Renewable energy fastenersMarine & Coastal Hardware
SS316 / A4 nylon lock nuts are preferred for stainless marine hardware exposed to salt spray. Typical RFQs include M6, M8, M10 and M12 lock nuts paired with A4 bolts and flat washers.
Marine fastenersConstruction & Outdoor Structures
Stainless nylon insert lock nuts can support railings, covers, brackets and service panels where loosening resistance is needed without a separate spring washer. M8, M10, M12 and M16 are common sizes.
Construction fastenersRailway & Rolling Stock Equipment
M5, M6, M8 and M10 stainless nyloc nuts are often requested for covers, access panels and brackets where prevailing-torque locking and maintenance access are important.
Railway fastenersWater Treatment / Washdown Equipment
SS316 / A4 lock nuts can be used on selected pumps, skids and stainless equipment where nylon insert compatibility is acceptable. Confirm temperature, chemical exposure, cleanability and certificate requirements before ordering.
Hygienic equipment fasteners03
Assembly
Recommended Matching Products
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Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
Cold forming or machining selected by size, nut height and quantityIncoming SS304 / SS316 material and nylon insert verification
Thread tapping and nylon insert assemblyGO / NO-GO thread gauge and prevailing torque checks when specified
Passivation for stainless nut body before final supplyAcross-flats, height, thread and insert position inspection
DIN 985 low type, DIN 982 high type and ISO references by orderProof load, torque or salt-spray tests arranged when specified
Bulk, small-box or matched bolt-washer-lock nut kit packagingCoC, MTC and inspection report prepared on request
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FAQ
Common Questions Before RFQ
What is the difference between DIN 985 and DIN 982 lock nuts?
DIN 985 is the common low-type nylon insert lock nut, while DIN 982 is a higher-style nylon insert lock nut. The correct type should follow the drawing, available thread engagement and assembly requirement.
Are stainless nylon insert lock nuts also called nyloc nuts?
Yes. In many RFQs, nylon insert lock nuts are also called nyloc nuts or nylon lock nuts. Confirm the standard, size, material, nut height and thread pitch when ordering.
Should I choose SS304 or SS316 nylon lock nuts?
SS304 / A2 is suitable for general corrosion-resistant assemblies. SS316 / A4 is preferred for marine, coastal, washdown, chemical or chloride-exposed environments.
What sizes are commonly requested?
Common RFQ sizes include M5, M6, M8, M10, M12 and M16 stainless nylon insert lock nuts. Final standard, material, thread pitch and certificate requirements should be confirmed by drawing or purchase specification.
Can nylon insert lock nuts be used in high temperature applications?
Nylon insert lock nuts are limited by nylon insert temperature and chemical compatibility. For high-temperature or aggressive chemical environments, confirm project approval or consider an all-metal locking option.
Can these lock nuts be supplied with bolts and washers?
Yes. Stainless nylon insert lock nuts can be supplied alone or as matched bolt-washer-lock nut sets with stainless hex bolts and flat washers.
Need DIN 985 / DIN 982 stainless nylon insert lock nuts?
Send your lock nut standard, size, material, quantity, thread pitch, service temperature, matching bolt requirement and certificate needs. Our team can confirm a suitable stainless nylon insert lock nut specification.
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