S-90923A232 M4 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the integrated external-tooth lock washer that maintains consistent clamping force in high-motion environments
• Enhanced corrosion protection with dual black-oxide finishes on both 18-8 stainless steel nut and 400 stainless steel washer for extended service life
• Reliable thread engagement with Class 6H metric coarse threads ensuring secure fastening and simplified installation
• Durable industrial construction combining two stainless steel grades for optimal strength and wear resistance
• Standard hex profile for compatibility with common metric tools and straightforward maintenance access
• Regulatory compliance meeting both RoHS 3 and REACH standards for safe use across industrial sectors
• Optimized dimensions (7mm width, 4.1mm height) providing space-efficient locking solutions in compact assemblies

Professional Applications & Engineering Value

This M4 locknut with external-tooth lock washer addresses critical vibration-induced loosening challenges in industrial equipment, automotive components, and machinery assemblies. The black-oxide 18-8 stainless steel construction provides exceptional corrosion resistance while the 400 series stainless steel lock washer creates positive mechanical locking through its external teeth that bite into mating surfaces. The metric coarse thread (0.7mm pitch) facilitates quick installation and reduces cross-threading risks, while the Class 6H thread fit ensures precise tolerances for reliable performance in high-stress applications. This dual-material approach delivers superior vibration resistance compared to standard locknuts, making it ideal for motors, conveyor systems, and outdoor equipment where environmental factors and constant motion would compromise conventional fasteners.

Specification Summary & Compliance

Manufactured to precise metric standards with Class 6H thread fit tolerance for consistent performance. The M4x0.7mm coarse thread configuration follows international metric specifications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance adherence. The external hex drive style and standard nut profile maintain compatibility with industry-standard installation tools and procedures.