S-91455A617 21 mm ID x 37 mm OD DIN 125; ISO 7089 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
• Precise dimensional fit with 21mm ID and 37mm OD ensuring perfect alignment and load distribution for M20 fasteners
• Enhanced durability from Rockwell C30 hardness providing reliable performance under high-stress applications
• International compliance assurance meeting both DIN 125 and ISO 7089 standards for consistent quality and interchangeability
• Optimized thickness range (2.7-3.3mm) offering ideal compression characteristics and vibration resistance
• Environmental responsibility with full RoHS 3 and REACH compliance for safe use in regulated industries
• Versatile industrial application suitable for machinery, construction, and automotive assemblies requiring metric flat washers

Professional Applications & Engineering Value

These M20 flat washers deliver critical engineering solutions where surface protection and load distribution are paramount. The zinc plated steel construction creates a sacrificial barrier against corrosion, significantly extending component life in outdoor equipment, marine applications, and industrial machinery exposed to moisture. The precise 21mm inner diameter ensures perfect seating on M20 bolts without play, while the 37mm outer diameter provides optimal surface coverage to prevent embedding in soft materials and distribute clamping forces evenly. Manufactured to DIN 125 and ISO 7089 specifications, these metric flat washers maintain dimensional consistency across global supply chains, reducing assembly errors in automotive frame construction, heavy machinery maintenance, and structural steel connections where vibration resistance and reliable performance are non-negotiable.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 21mm ID, 37mm OD, and 2.7-3.3mm thickness range manufactured to DIN 125 and ISO 7089 standards. The component achieves Rockwell C30 hardness for mechanical durability and carries full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use across industrial sectors.