S-92217A439 0.188" ID x 0.625" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel ensures long-term reliability in harsh or humid environments.
• Precise dimensional fit with a 0.188" inner diameter designed specifically for No. 8 screws, preventing misalignment and ensuring secure fastening.
• Optimized load distribution provided by the 0.625" outer diameter, which helps protect surfaces and reduce stress on assembled components.
• Consistent thickness control (0.056-0.071") guarantees uniform performance and reliable spacing in repetitive assembly operations.
• Industry-standard compliance with ASME B18.21.1 ensures mechanical integrity and interchangeability in professional applications.
• Environmental regulation adherence through RoHS 3 and REACH compliance, making them safe for use in regulated markets and eco-conscious projects.
• Broad industrial suitability due to their durable stainless steel construction, ideal for machinery, automotive, and outdoor equipment assemblies.

Professional Applications & Engineering Value

These 18-8 stainless steel flat washers are engineered to address common industrial challenges such as galvanic corrosion, surface damage, and fastener loosening under vibration. The inch-system dimensions (0.188" ID, 0.625" OD) provide an exact match for No. 8 screw applications, ensuring a snug fit that minimizes play and distributes clamping force evenly. This is critical in mechanical assemblies where precision and repeatability are paramount. The corrosion-resistant properties of 18-8 stainless steel make these washers ideal for use in chemical processing, marine environments, and food-grade equipment, where exposure to moisture or corrosive agents is a concern. By incorporating ASME B18.21.1 standards, these washers deliver consistent quality and performance, reducing the risk of assembly failure and maintenance costs in high-demand settings.

Specification Summary & Compliance

This flat washer conforms to ASME B18.21.1 specifications, with an inner diameter of 0.188", outer diameter of 0.625", and thickness ranging from 0.056" to 0.071". It is manufactured from 18-8 stainless steel and is designed for use with No. 8 screw sizes. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets current environmental and safety standards for industrial components.