S-90377A156 0.219" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel with black-oxide finish, ideal for harsh industrial environments
• Precise dimensional fit with 0.219" inner diameter ensuring secure seating on No. 10 screws
• Enhanced load distribution through 1.5" outer diameter, reducing surface pressure and material stress
• Consistent thickness tolerance (0.030-0.070") for uniform performance in assembly applications
• Environmental compliance assurance with RoHS 3 and REACH regulations for global supply chain compatibility
• Durable stainless steel construction maintaining integrity in high-moisture and chemical exposure scenarios
• Versatile inch-system compatibility for seamless integration with standard North American equipment and fasteners

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat washer addresses critical engineering challenges in corrosive environments where standard fasteners fail. The 18-8 stainless steel core provides inherent resistance to oxidation and chemical degradation, while the black-oxide surface treatment enhances additional protection against galvanic corrosion. With its optimized 1.5" OD, the washer effectively distributes clamping force across wider surfaces, preventing joint loosening in vibration-prone assemblies. The precise 0.219" ID ensures perfect alignment with No. 10 screw sizes, eliminating installation errors in automotive, marine, and industrial equipment where corrosion-resistant washers are mandatory for long-term structural integrity.

Specification Summary & Compliance

Manufactured to standard inch-system dimensions with 0.219" inner diameter and 1.5" outer diameter. The flat washer features standard thickness range of 0.030-0.070" for consistent performance. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted international distribution. Material certification confirms 18-8 stainless steel composition with black-oxide surface treatment for enhanced durability in industrial applications.