S-93786A300 19.6 mm ID x 33.3 mm OD High-Pressure Bonded Sealing Washers For Screw Heads

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber bonded to steel, providing reliable leak prevention for both fluids (up to 4900 psi) and gases (up to 200 psi)
• Excellent corrosion resistance due to zinc-plated steel construction, ensuring long-term durability in harsh industrial environments
• Wide temperature tolerance from -10°F to 240°F, maintaining seal integrity and performance across diverse operating conditions
• Optimized dimensional accuracy with 19.6mm ID and 33.3mm OD for perfect fit with M20 screws, preventing loosening and ensuring secure fastening
• Enhanced mechanical strength with Rockwell B105 hardness, resisting deformation under high pressure and heavy loads
• Dual-material durability combining steel's structural rigidity with Buna-N rubber's flexibility for vibration damping and repeated use
• Easy installation and compatibility with metric M20 fasteners, reducing assembly time and improving maintenance efficiency

Professional Applications & Engineering Value

This metal bonded washer with zinc-plated steel and Buna-N rubber seal addresses critical sealing challenges in demanding industrial applications. The bonded design eliminates separate gaskets, providing a unified solution that prevents fluid and gas leaks in high-pressure systems up to 4900 psi. The metric M20 sizing ensures precise fitment in machinery, automotive, and hydraulic equipment where temperature fluctuations from -10°F to 240°F commonly occur. The black Buna-N seal offers excellent compression set resistance, maintaining seal integrity despite vibration and thermal cycling. Engineers value this industrial washer for its ability to simplify assembly while delivering reliable performance in heavy-duty applications where failure is not an option.

Specification Summary & Compliance

This metric washer features precise dimensions of 19.6mm ID x 33.3mm OD with thickness tolerance of 1.5-1.8mm, ensuring proper fit with M20 fasteners. Manufactured to industry standards for metal bonded washers with zinc-plated steel construction and Buna-N rubber seal rated at Durometer 60A hardness. The washer maintains performance within specified temperature ranges and pressure ratings, with materials typically compliant with RoHS and REACH environmental directives for industrial components.