S-93825A120 M4 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the integrated external-tooth lock washer that bites into surfaces to prevent loosening under dynamic loads.
• High-strength performance with a Class 8 rating, ensuring reliable clamping force and durability in demanding industrial environments.
• Enhanced corrosion protection from the zinc-plated steel construction, extending service life and reducing maintenance needs.
• Precise metric threading with M4 x 0.7mm coarse pitch and Class 6H thread fit for easy installation and consistent engagement.
• Secure and reusable locking thanks to the steel external-tooth washer design, which maintains holding power even after multiple uses.
• Standard 7mm hex profile for compatibility with common wrenches, facilitating quick assembly and disassembly.
• Compliance with RoHS 3 standards, ensuring environmental safety and suitability for regulated industries.

Professional Applications & Engineering Value

This M4 locknut is engineered to address common challenges in industrial applications where vibration and shock loads can compromise fastener integrity. The zinc-plated steel material provides excellent resistance to rust and wear, while the external-tooth lock washer system creates a mechanical lock that distributes stress evenly and prevents back-off. Ideal for machinery, automotive assemblies, and electrical enclosures, this metric locknut ensures long-term reliability with its Class 8 strength and coarse thread pitch, reducing the risk of failure in high-stress environments. Its right-hand thread and standard hex design enable efficient installation, saving time and labor costs.

Specification Summary & Compliance

This locknut features precise M4 x 0.7mm coarse pitch threading with a Class 6H thread fit per metric standards, ensuring dimensional accuracy and compatibility. Manufactured from zinc-plated steel, it meets Class 8 mechanical properties for high load-bearing capacity. The external-tooth lock washer, made of steel with an 8.5 mm OD, enhances locking performance. Compliance includes adherence to RoHS 3 (2015/863/EU) directives, confirming it is free of hazardous substances for safe use in various sectors.