DIN 6926 Non-Serrated Flanged Nylon Insert Locknuts (Flanged Nyloc Nuts)
DIN 6926 specifies the dimensions and requirements for hexagon nuts with an integrated, non-serrated flange and a nylon insert. This design combines three key functions in one component:
1) a locking feature via the nylon insert that resists loosening under vibration,
2) increased load distribution through the wide flange, eliminating the need for a separate washer
3) a non-marring bearing surface suitable for finished or delicate materials. They are a cost-effective and assembly-efficient solution for secure fastening in applications prone to vibration.
The key difference lies in the locking mechanism and the presence of a flange.
Standard |
Product Name |
Key Features |
Locking Mechanism |
Flange |
| DIN 985 | Hexagon Nylon Insert Locknut | Standard hex nut with nylon collar. | Nylon insert (friction-based). | No. |
| DIN 6926 | Flanged Hexagon Nylon Insert Locknut | Hex nut with integrated non-serrated flange and nylon collar. | Nylon insert (friction-based). | Yes, Non-Serrated. |
| DIN 6923 | Serrated Flanged Hexagon Nut | Hex nut with integrated serrated flange. | Serrations (mechanical biting). | Yes, Serrated. |
Primary Advantage: Provides reliable vibration resistance without damaging the contact surface, thanks to the combination of the nylon insert and smooth flange.
Load Distribution: The wide flange spreads clamping force, making these nuts ideal for use with oversized holes, thin sheets, or soft materials.
Temperature Limitation: The nylon insert can degrade (become brittle and lose effectiveness) at sustained high temperatures. Consult manufacturer specifications for the maximum continuous operating temperature.
Reusability: Can be reused a limited number of times, but the locking torque will progressively decrease with each reinstallation. For critical applications, replacement is recommended.
Material choice determines corrosion resistance, while the strength grade (for steel) indicates the nut's load-bearing capacity. It is crucial to match the nut strength grade with that of the bolt/screw to prevent thread stripping.
Material / Grade |
Key Properties |
Typical Applications |
Important Notes |
| Steel, Zinc-Plated (Grade 6 / Class 6) | Medium strength. Zinc plating offers basic corrosion protection for occasional moisture exposure. | General machinery, equipment, and non-critical structural assemblies in dry or indoor environments. | The most common economic choice. Ensure mating bolt is of comparable strength (e.g., ISO 898-1 Grade 6.8 or 8.8). |
| Steel, Zinc-Plated (Grade 8 / Class 10) | High strength. Approximately 25% stronger than Grade 6 nuts. | High-stress applications: valves, pumps, motors, and critical automotive or structural components. | Requires a high-strength mating bolt (e.g., ISO 898-1 Grade 10.9 or 12.9). |
| Stainless Steel A2 (18-8) | Good corrosion resistance, resists rust from water and mild chemicals. Non-magnetic in annealed state. | Outdoor fittings, food processing, marine interiors, and damp environments requiring corrosion resistance. | Offers the best balance of corrosion resistance, strength, and cost for most stainless applications. |
| Stainless Steel A4 (316) | Excellent corrosion resistance, superior to A2. Withstands harsh weather, salt water, and most chemicals. | Marine exteriors, chemical processing plants, coastal architecture, and highly corrosive environments. | Premium material for maximum durability in aggressive conditions. Slightly lower mechanical strength than equivalent grade steel nuts. |
| CLICK VIEW ONLIN | DIN 6926 Dimensions | DIN 6926 weight chart |
| CLICK DOWNLOAD | DIN 6926 Dimensions pdf | DIN 6926 weight chart pdf |
PIC |
PRODUCT |
SIZE |
GRADE |
FINISH |
THREAD |
 |
Non-Serrated Flanged Nylon Locking Nuts (DIN 6926) - Stainless Steel (A2) | M4-M10 | A2 Grade | Natural | Coarse |
|
Non-Serrated Flanged Nylon Locking Nuts (DIN 6926) - Marine Stainless Steel (316) | M6-M10 | A4 Grade | Natural | Coarse |
|
DIN 6926 Nylon Flange Steel Class 6 Zinc Plated Smooth Bottom Nut | M4-M12 | ISO Class 6 | Zinc CR3 | Coarse |
