S-97725A109 20.2 mm ID x 25.9 mm OD DIN 7603 Metal Sealing Washers

Key Features & Benefits at a Glance

• Corrosion-resistant aluminum construction ensures long-lasting performance in harsh environments without rust or degradation
• Lightweight design reduces overall assembly weight while maintaining structural integrity for transportation-sensitive applications
• Precise dimensional accuracy with 20.2mm ID and 25.9mm OD guarantees perfect fit with M20 screws and consistent load distribution
• DIN 7603 certification provides assurance of standardized quality and compatibility with European engineering specifications
• Optimized thickness range (1.3-1.7mm) offers flexibility for various compression and spacing requirements in assembly setups
• Excellent electrical and thermal conductivity makes these washers ideal for applications requiring heat dissipation or electrical grounding
• Non-magnetic properties prevent interference in sensitive electronic equipment and MRI environments

Professional Applications & Engineering Value

Engineered to DIN 7603 standards, these M20 metric aluminum flat washers solve critical challenges in industrial assembly where weight reduction and corrosion resistance are paramount. The aluminum material grade provides exceptional durability against environmental factors while maintaining the strength needed for automotive, marine, and industrial applications. The precise 20.2mm inner diameter ensures secure seating on M20 screws, preventing loosening from vibration and thermal cycling. The 25.9mm outer diameter creates an optimal bearing surface that distributes clamping force evenly, protecting sensitive materials from damage during torque application. This combination of lightweight construction and corrosion-resistant properties makes these washers particularly valuable in aerospace components, electrical enclosures, and marine hardware where traditional steel fasteners would add unnecessary weight or succumb to environmental degradation.

Specification Summary & Compliance

Manufactured to DIN 7603 specifications with precise metric dimensions: 20.2mm inner diameter, 25.9mm outer diameter, and 1.3-1.7mm thickness range. These aluminum flat washers maintain dimensional accuracy for proper fit with M20 screw sizes and are produced under quality-controlled processes. The washers comply with European standardization requirements and are suitable for applications requiring RoHS and REACH compliance due to their aluminum composition and manufacturing process.