S-90923A219 M4 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated external-tooth lock washer design that maintains clamping force under dynamic loads
• Excellent corrosion resistance with 18-8 stainless steel construction suitable for harsh industrial environments
• Reliable locking performance featuring 400 stainless steel washer that bites into mating surfaces for secure fastening
• Easy installation and removal with standard 7mm hex profile and coarse thread spacing for efficient assembly
• Precise thread engagement with Class 6H thread fit ensuring consistent performance and compatibility
• Environmental compliance meeting RoHS 3 and REACH standards for safe industrial applications
• Durable construction combining two stainless steel components for long service life in demanding conditions

Professional Applications & Engineering Value

This M4 locknut with external-tooth lock washer addresses critical vibration-induced loosening challenges in industrial equipment and machinery. The 18-8 stainless steel construction provides excellent corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements, while the 400 stainless steel washer features precision-cut teeth that dig into mating surfaces to prevent rotational movement. The metric coarse thread with Class 6H thread fit ensures reliable engagement and disengagement, making it ideal for assembly lines requiring repeated maintenance. This combination of materials and locking mechanism delivers exceptional performance in automotive assemblies, electrical enclosures, machinery frames, and other applications where vibration resistance and corrosion protection are paramount for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This precision-engineered M4 x 0.7mm locknut features Class 6H thread fit according to metric standards, ensuring dimensional accuracy and reliable performance. The fastener system combines an 18-8 stainless steel hex nut with a 400 stainless steel external-tooth lock washer, providing a complete locking solution in a compact 7mm width x 4.1mm height package. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, making it suitable for regulated industrial applications requiring compliance with hazardous substance restrictions.