S-90377A145 0.203" ID x 0.875" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments and extending service life.
• Exceptional load distribution due to precise 0.875" OD and 0.203" ID, preventing surface damage and loosening under vibration.
• Enhanced durability and wear resistance from Rockwell B68 hardness, maintaining integrity in high-stress applications.
• Reliable fit for No. 10 screws with controlled 0.110-0.140" thickness, ensuring secure fastening and reduced assembly errors.
• Compliance with strict environmental standards including RoHS 3 and REACH, supporting sustainable and safe industrial operations.
• Optimized for heavy-duty use in inch-system assemblies, providing consistent performance in demanding mechanical setups.

Professional Applications & Engineering Value

This flat washer is engineered to address common industrial challenges such as corrosion, fastener failure, and inconsistent load bearing. Crafted from Black-Oxide 18-8 Stainless Steel, it offers excellent resistance to rust and chemicals, making it suitable for outdoor equipment, marine hardware, and chemical processing plants. The precise 0.203" ID and 0.875" OD ensure a perfect match for No. 10 screw size fasteners, distributing pressure evenly to prevent joint fatigue and material deformation. Its Rockwell B68 hardness guarantees long-term reliability in high-vibration environments like machinery, automotive assemblies, and structural frameworks, reducing maintenance needs and downtime.

Specification Summary & Compliance

This washer meets standard inch-system dimensions with an inner diameter of 0.203", outer diameter of 0.875", and thickness range of 0.110-0.140". It conforms to general industrial tolerances for flat washers and is manufactured from 18-8 stainless steel with a black-oxide finish for added protection. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards without hazardous substances.