S-98370A028 0.281" ID x 0.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 Stainless Steel construction, ideal for harsh or humid environments.
• Precise load distribution with 0.625" outer diameter, reducing surface pressure and preventing joint loosening.
• Reliable fit for 1/4" screws with 0.281" inner diameter, ensuring secure fastening and alignment.
• Enhanced durability from Rockwell B83 hardness, providing excellent resistance to wear and deformation.
• Consistent performance with thickness ranging from 0.105" to 0.130", offering dependable spacing and vibration resistance.
• Global compliance assurance meeting RoHS 3 and REACH standards, safe for regulated industrial applications.
• Versatile inch system compatibility designed for seamless integration with standard imperial fasteners and equipment.

Professional Applications & Engineering Value

These 18-8 Stainless Steel flat washers deliver critical engineering value by addressing common industrial challenges such as corrosion-induced failure, surface damage, and fastener loosening under dynamic loads. The inch system design, featuring a 0.281" ID and 0.625" OD, ensures precise fit for 1/4" screw applications in machinery, construction, and marine assemblies. With Rockwell B83 hardness, the washers maintain structural integrity under high stress, while the stainless steel material offers long-term reliability in corrosive or high-moisture settings. This makes them indispensable for industrial washers used in automotive, plumbing, and outdoor infrastructure, where consistent performance and corrosion resistance are non-negotiable.

Specification Summary & Compliance

This flat washer is manufactured to standard inch dimensions with an inner diameter of 0.281", outer diameter of 0.625", and thickness tolerance of 0.105" to 0.130", ensuring precise fit for 1/4" screws. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use. The 18-8 Stainless Steel material and Rockwell B83 hardness further guarantee consistent quality and durability in demanding applications.