S-90377A191 1.812" ID x 3.5" OD General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh industrial environments and outdoor applications.
• Precise dimensional fit with 1.812" ID and 3.5" OD, ensuring optimal load distribution and secure fastening for 1 3/4" screws.
• Enhanced durability and longevity due to the robust stainless steel construction, reducing replacement frequency and maintenance costs.
• Reliable performance in demanding conditions with a thickness range of 0.100-0.180", providing consistent pressure distribution and vibration resistance.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global supply chains.
• Versatile application in heavy-duty assemblies such as machinery, construction, and automotive sectors, thanks to its inch system measurements.
• Cost-effective maintenance solution by preventing surface damage and galling, extending the life of connected components.

Professional Applications & Engineering Value

This heavy-duty flat washer is engineered to address common industrial challenges like corrosion, load stress, and assembly failures. Crafted from Black-Oxide 18-8 Stainless Steel, it offers exceptional resistance to rust and chemical exposure, making it suitable for applications in marine, chemical processing, and outdoor infrastructure. The precise 1.812" ID and 3.5" OD dimensions ensure a snug fit for 1 3/4" screw size fasteners, distributing loads evenly to prevent loosening under vibration and thermal cycling. Its robust construction minimizes wear on surfaces, reducing the need for frequent replacements and enhancing the reliability of industrial assemblies. Ideal for use in construction equipment, heavy machinery, and automotive systems, this washer delivers long-term performance and cost savings by mitigating corrosion-related downtime and maintenance issues.

Specification Summary & Compliance

This flat washer features an inner diameter of 1.812", outer diameter of 3.5", and thickness ranging from 0.100" to 0.180", designed for use with 1 3/4" screw sizes in inch measurement systems. It is manufactured from Black-Oxide 18-8 Stainless Steel, providing inherent corrosion resistance without a rated hardness. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring it is free from hazardous substances and suitable for environmentally regulated applications. No specific thread standard or manufacturing specification is detailed, but it meets general industrial requirements for flat washers in mechanical and structural assemblies.