S-3118N11 0.125" ID x 0.438" OD Finishing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments due to 316 stainless steel construction, ideal for marine, chemical, and outdoor applications.
• Precise 82° countersink angle ensures a flush, professional finish with flat-head screws, reducing snagging and improving safety.
• Optimized dimensions (0.125" ID, 0.438" OD) provide a secure fit for No. 4 screws, distributing load evenly to prevent joint loosening.
• Rockwell B83 hardness offers excellent durability and resistance to deformation under pressure, extending service life.
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global industrial supply chains.
• Consistent thickness (0.084-0.104") ensures reliable performance and ease of installation in repetitive assembly processes.
• Inch system compatibility simplifies sourcing and integration with standard North American machinery and components.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 316 stainless steel countersunk washer addresses common challenges like corrosion-induced failure and inconsistent seating. The 82° countersink angle aligns perfectly with standard flat-head screws, eliminating protrusions that can cause equipment damage or safety hazards. Made from 316 stainless steel, it excels in corrosive environments such as chemical processing, marine hardware, and food manufacturing, where moisture and chemicals are prevalent. Its precise inch dimensions and Rockwell B83 hardness ensure reliable load distribution and longevity, reducing maintenance costs and downtime in heavy-duty applications. By combining material resilience with exacting design, this washer enhances structural integrity and operational efficiency.

Specification Summary & Compliance

This washer features standard inch measurements with an ID of 0.125", OD of 0.438", and thickness range of 0.084-0.104", designed for No. 4 screw sizes. It adheres to common industrial standards for countersunk washers, including the 82° angle for compatibility with flat-head fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety criteria for hazardous substances.