S-93786A325 21.6 mm ID x 31.4 mm OD High-Pressure Bonded Sealing Washers For Screw Heads

Key Features & Benefits at a Glance

• Exceptional Sealing Performance: Buna-N rubber seal bonded to zinc-plated steel prevents leaks under high fluid pressure up to 3700 psi and gas pressure up to 200 psi, ensuring reliable operation in hydraulic and pneumatic systems.
• Superior Corrosion Resistance: Zinc-plated steel construction provides excellent protection against rust and environmental degradation, extending service life in harsh industrial conditions.
• Wide Temperature Tolerance: Withstands temperatures from -10°F to 240°F, maintaining seal integrity and mechanical properties in fluctuating thermal environments.
• Optimized Load Distribution: Metal bonded design with 31.4 mm OD and 1.1-1.4 mm thickness evenly distributes clamping forces, reducing stress on M22 fasteners and connected components.
• Enhanced Durability: Rockwell B105 hardness for the steel washer and Durometer 60A for the rubber seal offer balanced resistance to wear, compression, and deformation under heavy loads.
• Precision Fit for M22 Screws: 21.6 mm inner diameter ensures accurate alignment and secure fastening, minimizing installation errors and improving assembly efficiency.
• Versatile Industrial Application: Black Buna-N rubber and metric sizing make it ideal for machinery, automotive, and construction sectors where high-pressure sealing and metric standards are critical.

Professional Applications & Engineering Value

This M22 metal bonded washer combines zinc-plated steel with a Buna-N rubber seal to address common challenges in high-pressure industrial systems. The metal-to-rubber bonding ensures a permanent seal that resists dislodgement under vibration, while the metric dimensions (21.6 mm ID, 31.4 mm OD) provide precise compatibility with M22 fasteners in heavy-duty equipment. Engineers benefit from its ability to maintain seal integrity at fluid pressures up to 3700 psi and temperatures from -10°F to 240°F, preventing leaks in hydraulic lines, pneumatic controls, and fluid transfer applications. The black Buna-N rubber offers good resistance to oils and weathering, making it suitable for outdoor or contaminated environments where durability and reliability are paramount for reducing maintenance downtime and ensuring operational safety.

Specification Summary & Compliance

This washer adheres to metric system standards with precise dimensions: Inner Diameter of 21.6 mm, Outer Diameter of 31.4 mm, and Thickness of 1.1-1.4 mm, designed for M22 screw sizes. The zinc-plated steel meets common corrosion resistance requirements, while the Buna-N rubber seal complies with industry specifications for temperature and pressure ratings. It is manufactured to ensure consistent performance under maximum fluid pressure of 3700 psi and gas pressure of 200 psi, with hardness values of Rockwell B105 for steel and Durometer 60A for rubber. The product aligns with general industrial safety and material standards, though specific compliance such as RoHS or REACH should be verified per batch for environmental regulations.