S-90377A178 0.5" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and long-term reliability.
• Precise load distribution due to 0.5" ID and 1.5" OD, minimizing surface damage and loosening under vibration.
• Consistent performance with a thickness range of 0.110-0.140", ensuring reliable spacing and clamping force.
• Perfect compatibility designed specifically for 7/16" screw sizes, reducing installation errors and improving assembly efficiency.
• Environmental compliance meeting RoHS 3 and REACH standards, safe for regulated industries and global supply chains.
• Durable material strength from 18-8 stainless steel, offering excellent mechanical properties without rated hardness limitations for general use.
• Versatile industrial application as a flat washer, providing essential protection in machinery, construction, and automotive assemblies.

Professional Applications & Engineering Value

These flat washers are engineered to address common industrial challenges such as corrosion, surface abrasion, and fastener loosening. The Black-Oxide 18-8 Stainless Steel construction ensures exceptional resistance to rust and chemicals, making them suitable for outdoor, marine, and chemical processing equipment. With an ID of 0.5" and OD of 1.5", they effectively distribute loads and prevent embedding into soft materials, while the precise thickness of 0.110-0.140" maintains consistent joint integrity. Ideal for use with 7/16" screw sizes in heavy-duty assemblies, these washers enhance the longevity and reliability of industrial fastening systems, reducing maintenance costs and downtime.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.5", outer diameter of 1.5", and thickness range of 0.110-0.140", designed for standard 7/16" screw sizes in inch measurement systems. Manufactured from Black-Oxide 18-8 Stainless Steel, it adheres to common industrial specifications for flat washers without a rated hardness, ensuring broad applicability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe usage in global markets.