S-98691A122 21 mm ID x 34 mm OD DIN 433; ISO 7092 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance due to brass material, ideal for humid or chemically aggressive environments
• Excellent durability and load distribution with Rockwell B76 hardness, reducing surface damage and extending component life
• Precise metric sizing (21mm ID, 34mm OD) ensures perfect fit for M20 screws, preventing loosening and misalignment
• Reliable compliance with DIN 433 and ISO 7092 standards guarantees consistent quality and interchangeability in industrial assemblies
• RoHS 3 compliant with exemption for lead in copper alloy meets environmental regulations without sacrificing performance
• Optimized thickness (2.7-3.3mm) provides stable spacing and vibration resistance in heavy-duty applications
• Non-magnetic and conductive properties of brass make it suitable for electrical and electronic equipment

Professional Applications & Engineering Value

This M20 brass flat washer is engineered to address common industrial challenges such as galvanic corrosion, fastener wear, and assembly instability. Made from high-quality brass material, it naturally resists rust and oxidation, making it perfect for marine, plumbing, and outdoor applications where moisture is a concern. The precision metric dimensions and adherence to DIN 433 and ISO 7092 standards ensure seamless integration with M20 fasteners, providing uniform load distribution and reducing the risk of joint failure. Its Rockwell B76 hardness offers reliable performance under repetitive stress, while the RoHS 3 compliance supports sustainable manufacturing practices. Ideal for machinery, automotive, and electrical systems, this washer enhances longevity and safety in demanding environments.

Specification Summary & Compliance

This washer features an inner diameter of 21 mm, outer diameter of 34 mm, and thickness range of 2.7-3.3 mm, designed for M20 screw size with precise metric tolerances. It conforms to DIN 433 and ISO 7092 specifications, ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(c) for lead in copper alloy, meeting international environmental and safety standards for industrial use.