S-91525A422 0.938" ID x 2.25" OD ASME B18.21.1 Oversized 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 0.938" inner diameter designed specifically for 7/8" screws, ensuring secure fastening and load distribution.
• Enhanced durability and surface protection with a large 2.25" outer diameter, providing excellent bearing surface and preventing material embedment.
• Consistent performance and reliability guaranteed by compliance with the ASME B18.21.1 standard for dimensional accuracy and quality.
• Safe for sensitive applications with full compliance to RoHS 3 and REACH regulations, ensuring environmental and workplace safety.
• Robust construction with a thickness range of 0.140" to 0.170", offering reliable performance under heavy-duty mechanical stress.
• Wide industrial compatibility in inch measurement systems, making them suitable for various machinery, construction, and equipment assembly needs.

Professional Applications & Engineering Value

These 316 stainless steel flat washers are engineered to address critical challenges in demanding industrial settings, such as exposure to corrosive agents, high humidity, and chemical processing environments. The high-grade 316 stainless steel material provides exceptional resistance to pitting and crevice corrosion, significantly extending the service life of assemblies in marine, oil and gas, and food processing industries. With a precise 0.938" ID for 7/8" screws and a generous 2.25" OD, these washers effectively distribute clamping force, reduce surface pressure, and prevent fastener loosening under vibration. This design minimizes maintenance needs and enhances the structural integrity of heavy machinery, piping systems, and structural frameworks, ensuring reliable performance in heavy-duty applications where failure is not an option.

Specification Summary & Compliance

This flat washer conforms to ASME B18.21.1 standards, ensuring precise dimensional tolerances for consistent fit and function. Key specifications include an inner diameter of 0.938", outer diameter of 2.25", and thickness ranging from 0.140" to 0.170", designed for use with 7/8" screws in inch measurement systems. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental safety and hazardous substance restrictions for industrial use.