S-97725A135 33.3 mm ID x 38.9 mm OD DIN 7603 Metal Sealing Washers

Key Features & Benefits at a Glance

• Excellent electrical and thermal conductivity due to pure copper material, ensuring reliable performance in electrical and grounding applications.
• Superior corrosion resistance for long-lasting durability in harsh or humid industrial environments.
• Precise dimensional fit with a 33.3mm inner diameter designed specifically for M33 screws, providing secure fastening and load distribution.
• Compliance with DIN 7603 standard guarantees consistent quality, interchangeability, and reliable performance in European mechanical assemblies.
• RoHS 3 and REACH compliant construction ensures environmental safety and meets strict international regulations for hazardous substances.
• Optimized thickness range of 1.8-2.2mm offers a balance between mechanical strength and conformability for effective sealing and spacing.
• Versatile flat washer profile ideal for distributing load, preventing surface damage, and reducing loosening under vibration.

Professional Applications & Engineering Value

This M33 metric copper flat washer is engineered to address critical needs in electrical, automotive, and industrial machinery. The high-purity copper material provides exceptional conductivity, making it ideal for grounding connections, busbars, and electrical enclosures where minimizing resistance is crucial. Its inherent corrosion resistance ensures longevity in challenging conditions, preventing galvanic corrosion when paired with dissimilar metals. Manufactured to DIN 7603, this washer delivers precise dimensions and consistent performance, reducing assembly errors and maintenance downtime. The flat design effectively distributes clamping force, protects surfaces from damage, and maintains bolt preload in high-vibration applications, offering a reliable, compliant solution for professional engineers and procurement specialists.

Specification Summary & Compliance

This washer conforms to DIN 7603 for dimensional accuracy, with an inner diameter of 33.3mm, outer diameter of 38.9mm, and thickness between 1.8-2.2mm, designed for M33 screw size. It is manufactured from copper and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from restricted hazardous substances and safe for use in various industrial and electrical applications.