S-91525A415 0.281" ID x 0.688" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 316 stainless steel construction, ideal for harsh chemical and marine environments.
• Reliable load distribution with a precise 0.281" ID and 0.688" OD, preventing surface damage and loosening under vibration.
• Consistent mechanical strength provided by Rockwell B68 hardness, ensuring long-term durability and shape retention.
• Guaranteed dimensional accuracy with a thickness range of 0.060-0.090", facilitating easy installation and uniform performance.
• Broad industrial compatibility as a flat washer designed for 1/4" screws in inch-system applications.
• Unrestricted global compliance meeting RoHS 3 and REACH standards for safe use in regulated industries.
• Reduced maintenance costs due to superior material properties that resist pitting and crevice corrosion.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 316 stainless steel flat washers provide critical protection against galvanic corrosion and stress cracking in chemical processing, marine equipment, and offshore installations. The inch-system measurement and precise 1/4" screw size compatibility ensure seamless integration with existing North American machinery and fastening systems. By utilizing a Rockwell B68 hardness rating, the washers maintain structural integrity under high clamp loads and cyclic stresses, preventing deformation that could lead to joint failure. The optimized OD to ID ratio offers superior bearing surface coverage, effectively distributing pressure and protecting sensitive components from abrasion. This combination of corrosion-resistant properties and mechanical reliability translates to extended service intervals and reduced downtime in critical applications where fastener failure is not an option.

Specification Summary & Compliance

This flat washer conforms to standard inch-system dimensional tolerances with an Inside Diameter of 0.281", Outside Diameter of 0.688", and Thickness range of 0.060-0.090" specifically designed for 1/4" screw applications. Manufacturing consistency is verified through Rockwell B68 hardness testing. The product fully complies with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations concerning SVHC (Substances of Very High Concern) as of the June 14, 2023 declaration, ensuring adherence to international environmental and safety standards for industrial components.