S-91116A210 20 mm ID x 56 mm OD DIN 9021 Oversized Washers
Oversized Washers
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ensuring longevity in harsh environments
- Precise dimensional fit with 20mm ID and 56mm OD designed for M18 screws, reducing assembly errors and improving joint integrity
- Enhanced load distribution thanks to DIN 9021 standard design, minimizing surface damage and preventing fastener loosening
- Consistent mechanical performance with Rockwell B75 hardness, providing reliable strength and wear resistance
- Environmental and regulatory safety through full RoHS 3 and REACH compliance, meeting global industrial standards
- Durable thickness range of 3.4-4.6mm for stable spacing and vibration resistance in demanding applications
Professional Applications & Engineering Value
This M18 flat washer excels in industrial settings where corrosion resistance and precise load distribution are critical. Manufactured from passivated 18-8 stainless steel, it effectively prevents rust and chemical degradation, making it ideal for outdoor machinery, marine equipment, and chemical processing plants. The DIN 9021 specification ensures uniform pressure spreading, which protects surfaces from indentation and reduces the risk of bolt fatigue under dynamic loads. Its metric dimensions (20mm ID, 56mm OD) guarantee compatibility with M18 fasteners, streamlining assembly in automotive, construction, and heavy machinery applications. By integrating this washer, engineers achieve longer service life, reduced maintenance costs, and enhanced safety in corrosion-resistant and high-stress environments.
Specification Summary & Compliance
This flat washer adheres to DIN 9021 standards, with precise internal diameter of 20mm, outer diameter of 56mm, and thickness ranging from 3.4 to 4.6mm. It is manufactured from 18-8 stainless steel with a passivated surface treatment and Rockwell B75 hardness for consistent performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets stringent environmental and safety requirements for industrial use.
