Stronger Thread Engagement
Higher nut height provides longer thread engagement, improving load capacity and connection strength.
DIN 6924 Prevailing torque type hexagon nuts with non-metallic insert
- Standard: DIN 6924
- Material: Stainless Steel
- Thread Size: M3-M48
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
DIN 6924 is a German standard for prevailing torque type hexagon nuts with non-metallic insert, commonly known as nylon insert lock nuts (Nyloc nuts). The nut integrates a polyamide (PA) locking ring inside the top portion, creating resistance against loosening caused by vibration and dynamic loads.
DIN 6924 lock nuts are designed to provide secure fastening without additional locking washers or adhesives. The non-metallic insert creates friction on the bolt thread, preventing accidental loosening while maintaining easy installation with standard tools.
Although DIN 6924 has been withdrawn and replaced by international equivalents such as DIN EN ISO 7040 and DIN EN ISO 10512, it remains widely used in industrial specifications and customer drawings, especially in European markets.
Draw
Specification
DIN 6924 vs DIN 985
Higher Strength & Better Thread Engagement
DIN 6924 has a higher nut profile and longer thread engagement than DIN 985, providing better load distribution and stronger fastening performance. It is more suitable for heavy-duty applications.
Compact Design & General Applications
DIN 985 features a lower profile design, making it ideal for applications with limited installation space and medium-load fastening requirements.
Different Application Focus
DIN 6924 is commonly used in automotive, machinery, and industrial assemblies where higher vibration resistance is required. DIN 985 is widely used for general mechanical fastening where a compact self-locking nut is needed.
Simply put:
DIN 6924 = Higher strength + better locking performance
DIN 985 = Compact size + general-purpose locking.
Precautions for Use
- Temperature Limits: Since these fasteners rely on nylon rings for locking, their operating temperature is limited by the temperature resistance of the nylon (typically, temperatures exceeding 120°C are not recommended). In high-temperature environments, all-metal lock nuts (such as DIN 6925) should be used.
- Reusability: Repeated disassembly causes permanent wear on the nylon rings, resulting in a decrease in locking torque. To ensure safety, reuse in critical applications is not recommended.
Product Advantages
Excellent Vibration Resistance
The nylon insert creates reliable prevailing torque, preventing loosening under vibration and dynamic loads.
Enhanced Industrial Performance
Compared with low-profile lock nuts, DIN 6924 offers better durability for automotive, machinery, and heavy-duty applications.
Common Questions
Is DIN 6924 the same as DIN 985?
No. Both use nylon inserts, but DIN 6924 generally has a higher nut profile and greater thread engagement compared with DIN 985.
What is the difference between DIN 6924 and metal lock nuts?
DIN 6924 uses a nylon insert for locking, while metal lock nuts use thread deformation or metal locking elements. Nylon lock nuts provide better thread protection but have lower temperature resistance.
What is DIN 6924 nut used for?
DIN 6924 is used for applications requiring a self-locking nut that can resist vibration and prevent accidental loosening.
What bolt should be used with DIN 6924?
DIN 6924 should be matched with standard metric bolts such as DIN 931, DIN 933, ISO 4014, and ISO 4017 with compatible thread sizes.
