S-94240A118 0.434" ID x 0.735" OD Bonded Sealing Washers

Key Features & Benefits at a Glance

• Reliable sealing performance with neoprene rubber bonded to aluminum, preventing leaks and contamination in demanding environments.
• Broad temperature resilience from -40°F to 250°F, ensuring consistent sealing and mechanical integrity under thermal cycling.
• Optimized for 3/8" screw applications with precise 0.434" ID and 0.735" OD, providing secure fit and even load distribution.
• Durable neoprene seal rated at Durometer 65A hardness, offering excellent compression set resistance and long service life.
• Lightweight aluminum construction reduces overall assembly weight while maintaining corrosion resistance.
• Full regulatory compliance with RoHS 3 and REACH standards, making it suitable for global industrial and electronic applications.
• Metal-to-rubber bonded design creates a permanent seal that won't separate during installation or vibration.

Professional Applications & Engineering Value

This metal-bonded aluminum washer with integrated neoprene rubber seal solves critical sealing challenges in industrial equipment, outdoor enclosures, and automotive assemblies. The aluminum washer provides structural support while the black neoprene seal (Durometer 65A) compensates for surface irregularities, creating a reliable barrier against moisture, dust, and air infiltration. Its temperature resistance from -40°F to 250°F makes it ideal for applications experiencing thermal expansion, such as engine components, HVAC systems, and electrical housings. The permanent metal-bonded construction ensures the seal remains intact during high-vibration scenarios, eliminating the need for separate gaskets and simplifying installation in 3/8" screw size applications.

Specification Summary & Compliance

This washer features precise dimensional specifications with 0.434" ID, 0.735" OD, and thickness range of 0.181-0.216". Manufactured to inch system standards for compatibility with 3/8" screw fasteners. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material transparency. The neoprene seal maintains consistent performance across the specified temperature range without hardening or degrading.