S-91195A139 3.9 mm ID x 14 mm OD Washdown Bonded Sealing Washers

Key Features & Benefits at a Glance

• Exceptional sealing performance with permanently bonded silicone rubber that prevents fluid and gas leakage up to 100 psi
• Reliable operation in extreme temperatures from -100°F to 400°F, maintaining seal integrity in harsh industrial environments
• Superior corrosion resistance due to 18-8 stainless steel construction, ensuring long service life in chemically aggressive applications
• Optimized mechanical strength with Rockwell B80 hardness metal component that resists deformation under load
• Precise dimensional compatibility with 3.9mm ID specifically designed for M4 screws, ensuring perfect fit and uniform load distribution
• Durable seal material featuring 50A durometer silicone rubber that maintains flexibility while resisting compression set
• Full regulatory compliance with RoHS 3 and REACH standards, making it suitable for regulated industrial applications worldwide

Professional Applications & Engineering Value

This M4 metal bonded washer solves critical sealing challenges in demanding industrial environments where temperature extremes and chemical exposure compromise ordinary fasteners. The 18-8 stainless steel base provides structural integrity while the red silicone rubber seal creates a permanent barrier against fluids and gases. Engineered for metric system applications requiring precise M4 screw compatibility, this washer prevents leakage in hydraulic systems, processing equipment, and automotive assemblies. The metal-to-rubber bonding technology ensures the seal remains intact during thermal cycling and vibration, eliminating the need for separate gaskets in high-temperature applications up to 400°F while maintaining flexibility at -100°F. This integrated solution reduces assembly time and improves reliability in pressure-resistant applications across multiple industries.

Specification Summary & Compliance

This precision metric washer features exact dimensional specifications with 3.9mm inner diameter, 14mm outer diameter, and 2-2.1mm thickness for optimal M4 screw compatibility. Manufactured to exacting standards with 18-8 stainless steel (Rockwell B80 hardness) permanently bonded to silicone rubber (Durometer 50A). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and chemical restriction adherence for global industrial applications.