S-91100A324 8.5 mm ID x 20.7 mm OD DIN 7349-A Oversized Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution: Designed for use with high-strength Class 10.9 fasteners, this washer effectively spreads the load to prevent surface damage and maintain joint integrity under high stress.
• Superior Corrosion Resistance: The zinc-plated steel construction provides a durable protective barrier, significantly increasing the washer's lifespan in harsh or outdoor industrial environments.
li>Precise Fit and Alignment: With a consistent 8.5mm ID and 20.7mm OD, this washer ensures a perfect fit on M8 screws, promoting proper alignment and reducing the risk of assembly errors.
• Guaranteed Mechanical Performance: Manufactured in compliance with the DIN 7349-A standard, guaranteeing dimensional accuracy, material quality, and consistent performance in demanding applications.
• Regulatory Compliance for Global Supply Chains: As RoHS 3 and REACH compliant, this component is approved for use in products marketed worldwide, simplifying your compliance and sourcing process.
• Optimized Thickness for Stability: The controlled thickness range of 3.7-4.3mm provides the ideal balance between compressive strength and flexibility, ensuring a secure and stable fastened connection.

Professional Applications & Engineering Value

This M8 flat washer is engineered to solve critical challenges in industrial assembly and machinery. The zinc-plated steel material combats corrosion, a common failure point in metal components exposed to moisture or chemicals, thereby extending maintenance intervals and improving equipment uptime. Its precise dimensions, conforming to the DIN 7349-A standard, ensure reliable performance when paired with high-tensile Class 10.9 fasteners, preventing loosening in high-vibration environments common in automotive, construction, and heavy machinery. By providing a consistent bearing surface, this washer prevents the fastener from embedding into softer materials, protecting expensive components and ensuring the long-term integrity of the bolted joint.

Specification Summary & Compliance

This washer is manufactured to the precise dimensional requirements of the DIN 7349-A standard, ensuring interchangeability and reliable performance. It is designed for an M8 screw size with an Inner Diameter (ID) of 8.5 mm, Outer Diameter (OD) of 20.7 mm, and a Thickness of 3.7-4.3 mm. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and suitable for global industrial supply chains.