S-90736A180 0.445" ID x 0.89" OD High-Pressure Bonded Sealing Washers For Screw Heads and Nuts

Key Features & Benefits at a Glance

• Superior Sealing Performance: The bonded PVC plastic sealant creates a reliable, leak-proof barrier against both fluids and gases, ensuring operational integrity in demanding environments.
• Exceptional Pressure Resistance: Withstands extreme pressures up to 8500 PSI, making it ideal for high-pressure hydraulic and pneumatic systems without failure.
• Wide Temperature Tolerance: Performs reliably across a broad temperature range from -60°F to 270°F, maintaining seal integrity in both cryogenic and elevated heat applications.
• Enhanced Durability & Corrosion Resistance: The 304 Stainless Steel core provides excellent resistance to rust and corrosion, while the Rockwell B75 hardness ensures long-term mechanical strength and wear resistance.
• Precision Fit for 7/16" Fasteners: Designed with a 0.445" ID and 0.89" OD for a perfect, secure fit on standard 7/16" screws, preventing loosening and misalignment.
• Environmental & Regulatory Compliance: Meets RoHS 3 (2015/863/EU) standards, ensuring the product is free from hazardous substances for safe use in regulated industries.
• Robust Metal-to-Seal Bond: The permanent metal-bonded construction prevents seal separation under vibration or dynamic loads, offering a maintenance-free sealing solution.

Professional Applications & Engineering Value

This metal bonded washer is engineered to solve critical sealing challenges in industrial applications where standard washers fail. The combination of a 304 Stainless Steel body and a permanently bonded black PVC plastic sealant addresses common pain points like fluid leakage, gas permeation, and seal degradation under thermal cycling or high pressure up to 8500 PSI. It is ideally suited for heavy-duty use in hydraulic systems, pneumatic controls, processing equipment, and automotive assemblies, providing a dependable seal that reduces downtime and maintenance costs. The temperature-resistant design ensures consistent performance from sub-zero conditions to moderate heat, making it a versatile component for engineers seeking reliability and long service life in their sealing solutions.

Specification Summary & Compliance

This washer features precise dimensions with an ID of 0.445" and OD of 0.89", designed for a 7/16" screw size. It is manufactured to high-quality standards with a Rockwell B75 hardness for durability. The product is RoHS 3 (2015/863/EU) Compliant, adhering to environmental regulations for restricted substances, and is rated for a maximum pressure of 8500 PSI for both fluids and gases.