S-90107A011 0.203" ID x 0.438" OD General Purpose 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 dimensional fit with a 0.203" ID and 0.438" OD ensures secure seating and even load distribution for No. 10 screws.
• Consistent thickness range (0.024-0.038") provides reliable performance and prevents joint loosening under vibration.
• Compliance with stringent environmental standards, including RoHS 3 and REACH, ensuring safety and regulatory acceptance for global markets.
• Durable and non-magnetic properties offer long service life and suitability for electronic and sensitive equipment assemblies.
• Broad industrial compatibility with inch-system fasteners, simplifying sourcing and integration into existing designs.

Professional Applications & Engineering Value

Engineered for demanding conditions, these 316 stainless steel flat washers address critical challenges in industrial assemblies where corrosion resistance and longevity are paramount. The inch-system dimensions, including the precise 0.203" ID and 0.438" OD, ensure optimal alignment and load spreading for No. 10 screw applications, reducing stress concentrations and preventing surface damage. This makes them ideal for use in marine hardware, chemical processing equipment, and food-grade machinery, where exposure to moisture, chemicals, or frequent washdowns is common. By incorporating high-quality 316 stainless steel, these washers minimize maintenance needs and enhance the reliability of fastener systems in corrosive environments, supporting efficient and safe operations.

Specification Summary & Compliance

This flat washer is manufactured to precise dimensional tolerances for the inch system, with an inner diameter of 0.203", outer diameter of 0.438", and thickness ranging from 0.024" to 0.038", ensuring compatibility with No. 10 screw sizes. It fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for hazardous substances. The use of 316 stainless steel provides inherent durability and resistance, making it suitable for various industrial and engineering applications without specific hardness ratings.