S-90377A188 1.062" ID x 2.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel, ideal for harsh industrial environments and outdoor applications.
• Precise dimensional fit with 1.062" ID and 2.5" OD ensures reliable performance and even load distribution for 1" screw assemblies.
• Enhanced durability and longevity due to the robust stainless steel material, reducing replacement frequency and maintenance costs.
• Versatile compatibility with inch system fasteners, making it suitable for a wide range of industrial machinery and equipment.
• Stable installation provided by the controlled thickness range of 0.110-0.140", minimizing loosening under vibration or dynamic loads.
• Environmental and safety compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries and global markets.
• Cost-effective protection for critical joints, preventing surface damage and extending the service life of connected components.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel Flat Washer is engineered to address common industrial challenges such as galvanic corrosion, mechanical stress, and environmental degradation. The Black-Oxide surface treatment on 18-8 stainless steel enhances corrosion resistance, making it ideal for applications in chemical processing, marine equipment, and outdoor structures where moisture and corrosive agents are prevalent. Its precise 1.062" ID and 2.5" OD dimensions ensure a secure fit for 1" screw size assemblies, distributing loads evenly to prevent bolt loosening and joint failure. By using these heavy-duty flat washers, engineers can improve assembly reliability, reduce downtime, and meet stringent industry standards for safety and performance in demanding environments.

Specification Summary & Compliance

This flat washer features an inner diameter of 1.062", outer diameter of 2.5", and thickness ranging from 0.110" to 0.140", designed for use with 1" screw sizes in inch measurement systems. It is manufactured from 18-8 Stainless Steel with a Black-Oxide finish for added protection. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and health safety standards. While hardness is not rated, the material provides reliable performance in various industrial applications, supporting quality and regulatory requirements.