S-98370A113 0.5" ID x 1.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemically aggressive environments
• Exceptional load distribution with precise 0.5" ID and 1.25" OD dimensions, preventing surface damage and joint loosening
• Enhanced durability and deformation resistance thanks to Rockwell B68 hardness, maintaining performance under high stress
• Perfect compatibility with 7/16" screws, ensuring secure fastening and reduced assembly time
• Consistent thickness control (0.170-0.200") for uniform pressure distribution and reliable performance
• Full regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Long-term reliability in demanding applications, reducing maintenance needs and replacement costs

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as fastener loosening, surface damage, and corrosion-induced failure. Its inch-based dimensions (0.5" ID x 1.25" OD) provide optimal load spreading for 7/16" screw applications, preventing embedding in soft materials and maintaining clamp force in vibrating machinery. The Rockwell B68 hardness ensures the washer resists deformation under high torque, while the stainless steel material offers excellent resistance to rust and chemicals, making it suitable for outdoor, marine, food processing, and chemical plant environments. This combination of precision sizing, material strength, and corrosion resistance delivers extended service life and reduced downtime in industrial washers applications.

Specification Summary & Compliance

This flat washer meets standard inch dimensional requirements with an inner diameter of 0.5", outer diameter of 1.25", and thickness range of 0.170-0.200", designed specifically for 7/16" screw sizes. Manufactured from 18-8 stainless steel with a hardness of Rockwell B68, it ensures consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial components.