S-95795A113 4.3 mm ID x 18 mm OD Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual internal/external teeth design that bites into both mating surfaces for maximum locking security
• Enhanced corrosion protection with zinc-plated steel construction, extending service life in demanding industrial environments
• Precise M4 screw compatibility with 4.3mm inner diameter ensuring perfect fit and optimal fastening performance
• Reliable load distribution thanks to 18mm outer diameter that provides excellent surface coverage and pressure dispersion
• Durable mechanical performance with 2.2-2.6mm thickness maintaining structural integrity under repeated stress cycles
• Global compliance assurance meeting RoHS 3 and REACH environmental standards for international project specifications
• Versatile installation capability with internal/external tooth configuration suitable for various assembly configurations

Professional Applications & Engineering Value

This M4 zinc-plated steel tooth lock washer delivers exceptional engineering value through its dual-action internal/external tooth design that effectively counters vibration-induced loosening in critical assemblies. The zinc-plated steel construction provides essential corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements. The metric dimensions (4.3mm ID × 18mm OD) ensure precise compatibility with M4 fasteners while the tooth configuration creates multiple biting points that maintain clamping force under dynamic loads. Ideal for industrial machinery, automotive components, electrical enclosures, and equipment manufacturing, this washer solves the common problem of fastener loosening in high-vibration environments, reducing maintenance frequency and improving overall assembly reliability.

Specification Summary & Compliance

This metric tooth lock washer features precise dimensions of 4.3mm inner diameter and 18mm outer diameter with a thickness range of 2.2-2.6mm, specifically engineered for M4 screw applications. Manufactured from zinc-plated steel with internal/external tooth configuration, the product maintains dimensional accuracy suitable for industrial fastening requirements. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and meeting international standards for hazardous substance restrictions.