S-3118N15 0.203" ID x 0.812" OD Finishing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance for long-lasting performance in harsh environments, including marine and chemical applications
• Precise 82° countersink angle ensures flush, professional finishes with No. 10 screws, eliminating protrusions
• Rockwell B83 hardness provides excellent durability and resistance to deformation under load
• Heavy-duty construction with 0.812" OD and 0.203" ID for reliable load distribution and screw retention
• Full RoHS 3 & REACH compliance guarantees safe, environmentally responsible use in regulated industries
• Consistent thickness (0.130-0.151") delivers uniform compression and reliable sealing capabilities
• 316 stainless steel material offers enhanced protection against pitting and crevice corrosion compared to standard grades

Professional Applications & Engineering Value

This 316 stainless steel countersunk washer solves critical engineering challenges in demanding applications where corrosion resistance and precision fit are paramount. The 82° countersink angle perfectly matches standard fastener profiles, creating seamless assemblies that prevent snagging and improve aerodynamic surfaces. Made from marine-grade 316 stainless steel, this washer withstands chloride-rich environments, chemical exposure, and extreme weather conditions that would rapidly degrade ordinary fasteners. The combination of Rockwell B83 hardness and precise dimensional tolerances ensures consistent performance in heavy-duty assemblies, preventing loosening under vibration and maintaining clamp force in structural applications. These industrial washers are particularly valuable in marine equipment, chemical processing systems, and food processing machinery where both corrosion resistance and flush mounting are essential requirements.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with 0.203" inner diameter and 0.812" outer diameter. Features standard 82° countersink angle compatible with No. 10 screws and thickness range of 0.130-0.151" for consistent performance. Constructed from 316 stainless steel with Rockwell B83 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates as of January 2023.