S-98466A030 0.38" ID x 0.891" OD Finishing Washers

Key Features & Benefits at a Glance

• Perfect flush mounting with an 82° countersink angle for seamless integration and improved aesthetics in finished assemblies.
• Superior corrosion resistance provided by 18-8 Stainless Steel, ensuring long-term durability in harsh or moist environments.
• Precise fit for 5/16" screws with a 0.38" inner diameter, reducing installation errors and enhancing joint integrity.
• Reliable load distribution due to the 0.891" outer diameter, which helps prevent surface damage and material pull-through.
• Compliance with stringent environmental regulations, including RoHS 3 and REACH, making them suitable for global markets and sensitive applications.
• Dimensional consistency in the inch system, ensuring compatibility with standard North American hardware and reducing sourcing complexity.
• Versatile for various industrial uses, offering a dependable solution for applications requiring a flat, low-profile fastener.

Professional Applications & Engineering Value

This 82° countersunk washer is engineered to address common challenges in precision assembly, such as achieving a flush surface and preventing corrosion-induced failure. Made from 18-8 stainless steel, it provides excellent resistance to rust and chemicals, making it ideal for outdoor equipment, marine hardware, and food processing machinery where hygiene and durability are critical. The countersink design ensures that screw heads sit perfectly flat, eliminating protrusions that could snag or cause injury. By using these inch system washers with a specified 5/16" screw size, engineers can streamline inventory and reduce mismatches in fastening systems, ultimately lowering maintenance costs and enhancing the lifespan of the assembly.

Specification Summary & Compliance

This washer features an inner diameter of 0.38", outer diameter of 0.891", and overall height of 0.18", designed for use with 5/16" screws in the inch measurement system. It conforms to standard dimensional tolerances for flat washers and includes an 82° countersink angle for consistent performance. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for environmentally conscious procurement.