DIN 982 specifies the dimensions and requirements for High (Thick) Nylon Insert Locking Nuts, commonly known as High Nyloc Nuts. These are prevailing torque nuts distinguished by their increased height compared to standard locknuts (e.g., DIN 985). The taller profile provides a larger wrenching area, which offers improved tool grip and makes them particularly useful in confined spaces or on hard-to-reach fasteners. Like standard Nyloc nuts, they feature a nylon collar that creates friction on the bolt threads to resist loosening from vibration.
The internationally recognized equivalent standard is ISO 7040 for high-height, non-metallic insert (prevailing torque) locknuts.
The primary difference is the nut height. DIN 982 defines a High or Thick version of a nylon insert locknut, while DIN 985 defines the standard, lower-profile version. The increased height of a DIN 982 nut provides a larger contact surface for a wrench or socket, reducing the chance of tool slippage and offering better accessibility in tight spaces. Both share the same locking mechanism (nylon insert) and similar performance characteristics regarding temperature limits and reusability.
Compare High Nylon Locking Nuts (DIN 982) by material type in terms of Grade, Finish, Performance, Application, and Pros/Cons.
Material Category
|
Typical Grade/ Class |
Standard Finish |
Performance & Key Characteristics |
Typical Applications |
Pros & Cons |
|
Medium-Strength Steel |
5 |
Zinc-Plated: Basic corrosion resistance for occasional moisture. Zinc Yellow-Chromate: More durable finish for most wet/outdoor environments. |
Standard strength for general use. Reliable locking from nylon insert. |
Fastening most machinery, equipment, and general industrial assemblies. |
Pros: Cost-effective, widely available. Cons: Not for highly corrosive or high-temperature environments. |
|
High-Strength Steel |
8 / 10 |
Zinc-Plated: Provides basic corrosion protection. |
~25% stronger than medium-strength grades. Ensures integrity in high-stress connections. |
Critical applications like valves, pumps, motors, and automotive components. |
Pros: High load-bearing capacity. Cons: Requires high-strength mating screws; plating offers limited corrosion resistance. |
|
Corrosion-Resistant Stainless Steel |
A2-70 (18-8) |
Naturally corrosion-resistant; no additional plating needed. |
Good corrosion resistance, resists rust from water and mild chemicals. Non-magnetic (annealed). |
Outdoor fittings, marine interiors, food processing, and damp environments. |
Pros: Excellent balance of corrosion resistance and strength. Cons: Not suitable for severe chemical exposure (e.g., chlorides). |
|
Corrosion-Resistant Stainless Steel |
A4-80 (316) |
Naturally corrosion-resistant; no additional plating needed. |
Excellent corrosion resistance, withstands harsh weather, salt water, and most chemicals. |
Marine exteriors, chemical processing plants, coastal infrastructure. |
Pros: Maximum durability in aggressive environments. Cons: Higher cost; slightly lower strength than equivalent grade steel nuts. |
Locking Mechanism: All rely on a nylon insert which may become brittle at sustained high temperatures (check manufacturer specs).
Reusability: Can be reused a limited number of times, but locking torque decreases with each reinstallation.
Installation: It is critical to match the nut's strength grade (e.g., Grade 8) with a comparable high-strength screw to avoid thread stripping.
| CLICK VIEW ONLIN | DIN 982 Dimensions | DIN 982 weight chart |
| CLICK DOWNLOAD | DIN 982 Dimensions pdf | DIN 982 weight chart pdf |
Active Stock List (All items are currently in stock)：
PIC |
PRODUCT |
SIZE |
GRADE |
FINISH |
THREAD |
|
|
M4-M24 |
A2 Grade |
Natural |
Coarse |
|
|
|
High Nylon Locking Nuts (DIN 982) - Marine Stainless Steel (A4) |
M4-M24 |
A4 Grade |
Natural |
Coarse |
|
|
High Nylon Locking Nuts (DIN 982) - Zinc Plated Carbon Steel (Class 4) |
M4-M24 |
4 Grade |
Zinc CR3 |
Coarse |
|
|
High Nylon Locking Nuts (DIN 982) - Zinc Plated Carbon Steel (Class 8) |
M4-M24 |
8 Grade |
Zinc CR3 |
Coarse |
