S-98026A517 8.5 mm ID x 20.7 mm OD DIN 7349 Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, ensuring long-term durability in harsh industrial environments.
• Reliable load distribution for Class 10.9 high-strength fasteners, preventing surface damage and maintaining joint integrity.
• Precise dimensional accuracy (8.5mm ID, 20.7mm OD, 3.7-4.3mm thickness) for consistent fit and reduced assembly errors.
• Compliance with DIN 7349 standard, guaranteeing interchangeability and quality in metric fastener systems.
• Environmental responsibility with RoHS 3 and REACH compliance, meeting strict regulatory requirements for hazardous substances.
• Versatile industrial application in machinery, automotive, and construction sectors where high-strength fastening is critical.
• Cost-effective maintenance due to enhanced corrosion protection, reducing replacement frequency and downtime.

Professional Applications & Engineering Value

This M8 flat washer is engineered to address common industrial challenges such as galvanic corrosion, uneven load distribution, and fastener loosening under vibration. The zinc yellow-chromate plated steel construction provides a robust barrier against moisture and chemicals, extending service life in demanding applications like automotive assemblies, heavy machinery, and structural frameworks. By conforming to DIN 7349 specifications, it ensures precise alignment with Class 10.9 bolts, distributing clamping forces evenly to prevent surface indentation and maintain bolt preload. This reduces the risk of joint failure, enhances safety, and supports efficient metric fastener systems in global supply chains.

Specification Summary & Compliance

This washer features an inner diameter of 8.5mm, outer diameter of 20.7mm, and thickness range of 3.7-4.3mm, designed for M8 screw sizes and Class 10.9 fastener strength. It strictly adheres to the DIN 7349 standard for dimensional and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from restricted hazardous substances and safe for industrial use.