S-4340N113 5.3 mm ID x 9.8 mm OD DIN 6798 Countersunk Tight-Grip External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial environments
• Perfect flush mounting with 90° countersink angle ensuring seamless integration with countersunk screw heads
• Precision dimensional control with 5.3mm ID and 9.8mm OD maintaining consistent performance in M5 fastener applications
• Optimal hardness balance at Rockwell C35 providing durable locking action without damaging connected components
• Guaranteed standardization through DIN 6798 compliance ensuring interchangeability and reliable performance
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe use across global markets

Professional Applications & Engineering Value

This M5 external tooth lock washer delivers critical vibration-resistant performance in demanding industrial applications where fastener security is paramount. The zinc-plated steel construction provides essential corrosion protection for machinery, automotive assemblies, and electrical enclosures exposed to harsh environments. Engineered with external teeth that create positive locking action, this countersunk washer solves the common problem of joint loosening in vibrating equipment. The 90° countersink angle ensures perfect alignment with standard countersunk screw heads, eliminating protrusions in precision assemblies. Meeting DIN 6798 specifications, these metric washers offer reliable performance in European equipment and global manufacturing applications requiring standardized components.

Specification Summary & Compliance

This external tooth lock washer features precise dimensions with 5.3mm internal diameter, 9.8mm external diameter, and 0.25-0.35mm thickness range. Manufactured to DIN 6798 standards with 90° countersink angle and Rockwell C35 hardness specification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.