S-98688A123 21 mm ID x 34 mm OD DIN 433; ISO 7092 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in harsh industrial environments
• Exceptional load distribution thanks to the 34mm outer diameter, preventing surface damage and maintaining joint integrity under M20 screw loads
• Precision dimensional accuracy with 21mm inner diameter ensuring perfect fit and easy installation on M20 fasteners
• Enhanced durability from Rockwell B76 hardness, providing reliable performance under repeated stress and vibration
• Guaranteed interchangeability through compliance with DIN 433 and ISO 7092 standards for consistent quality across applications
• Environmental responsibility with full RoHS 3 and REACH compliance, meeting strict international regulatory requirements
• Optimized thickness design (2.7-3.3mm) balancing strength requirements with space constraints in assembly applications

Professional Applications & Engineering Value

This M20 zinc plated steel flat washer delivers critical engineering solutions for industrial applications where vibration resistance and corrosion protection are paramount. The zinc plated steel construction provides essential galvanic protection in outdoor equipment, machinery assemblies, and structural frameworks exposed to moisture and chemicals. With precise adherence to DIN 433 and ISO 7092 standards, these washers ensure perfect compatibility with M20 fasteners in automotive, construction, and heavy machinery applications. The Rockwell B76 hardness maintains dimensional stability under high clamping forces, preventing deformation that could compromise joint security. Engineers specify these metric flat washers for their reliable performance in distributing loads across wider surfaces, effectively preventing bolt head embedding and surface damage to connected materials.

Specification Summary & Compliance

This flat washer features precise dimensional specifications including 21mm inner diameter, 34mm outer diameter, and 2.7-3.3mm thickness range. Manufactured to DIN 433 and ISO 7092 standards for dimensional accuracy and performance consistency. The washer demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. Material certification confirms zinc plated steel construction with Rockwell B76 hardness rating for specified mechanical properties.