S-93781A038 0.383" ID x 0.75" OD High-Pressure Bonded Sealing Washers For Nuts

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber that maintains integrity across a wide temperature range from -30°F to 220°F
• Exceptional pressure resistance handling fluid pressures up to 5000 psi for demanding industrial applications
• Enhanced corrosion protection through zinc-plated steel construction ensuring long-term durability in harsh environments
• Precision dimensional accuracy with 0.383" ID and 0.75" OD providing reliable fit for 3/8" fasteners
• Optimal material hardness featuring Rockwell B71 steel and Durometer 55A rubber for balanced strength and flexibility
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmental and safety requirements
• Dual-material reliability combining metal structural integrity with rubber sealing capabilities in a single bonded unit

Professional Applications & Engineering Value

This metal bonded washer delivers critical engineering solutions for industrial applications requiring reliable fluid containment and environmental sealing. The zinc-plated steel base provides structural strength with corrosion resistance, while the Buna-N rubber seal (Durometer 55A) creates an effective barrier against fluids, dust, and contaminants. Engineered for high-pressure applications up to 5000 psi, this washer prevents leakage in hydraulic systems, pneumatic equipment, and fluid transfer applications. The bonded construction eliminates separate sealing components, reducing assembly time and potential failure points. With its wide temperature resistance from -30°F to 220°F, this solution maintains performance in extreme environmental conditions, making it ideal for automotive, manufacturing, and heavy equipment applications where reliable sealing is paramount.

Specification Summary & Compliance

This precision metal bonded washer features exact dimensional specifications with 0.383" ID, 0.75" OD, and thickness between 0.059-0.069" for consistent performance with 3/8" fasteners. The construction combines zinc-plated steel with Rockwell B71 hardness and Buna-N rubber seal with Durometer 55A hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to current environmental and safety standards for industrial components.