S-97725A274 4.3 mm ID x 8 mm OD Metal Sealing Washers

Key Features & Benefits at a Glance

• Lightweight yet durable aluminum construction reduces overall assembly weight while maintaining reliable performance in non-corrosive environments.
• Precise 4.3mm inner diameter ensures perfect fit and secure seating for M4 screws, minimizing installation errors.
• Optimized 8mm outer diameter provides adequate surface distribution to prevent material damage under fastener heads.
• Consistent 0.8-1.2mm thickness range delivers reliable spacing and vibration resistance across production batches.
• Full RoHS 3 (2015/863/EU) compliance guarantees environmental safety and global market accessibility for your products.
• REACH (EC 1907/2006) compliance ensures responsible material sourcing and workplace safety standards.
• Metric system standardization enables seamless integration with international engineering specifications and global supply chains.

Professional Applications & Engineering Value

These M4 metric aluminum flat washers solve critical engineering challenges in weight-sensitive applications where corrosion resistance and electrical conductivity are paramount. The aluminum material provides excellent thermal and electrical properties while preventing galvanic corrosion when paired with compatible metals. In electronics assembly, aerospace components, and lightweight machinery, these flat washers effectively distribute clamping force across delicate surfaces, preventing cracking and deformation around M4 screw connections. The precise 4.3mm ID ensures consistent alignment without binding, while the 8mm OD offers optimal load distribution for prolonged joint integrity in vibration-prone environments.

Specification Summary & Compliance

This metric flat washer features precise dimensional tolerances with 4.3mm inner diameter and 8mm outer diameter specifications designed for M4 screw applications. The manufacturing complies with standard metric hardware specifications for consistent performance. Environmental compliance is verified through RoHS 3 (2015/863/EU) adherence for hazardous substance restriction and REACH (EC 1907/2006) compliance for chemical safety management, ensuring full regulatory acceptance in industrial markets.