S-90313A111 0.344" ID x 1.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or chemically aggressive environments.
• Precise dimensional fit with 0.344" ID and 1.25" OD, ensuring reliable load distribution and screw alignment for 5/16" fasteners.
• Consistent thickness tolerance (0.043-0.057") for uniform pressure application and reduced assembly variability.
• Broad industrial compatibility in inch measurement system, suitable for diverse machinery and equipment maintenance.
• Environmental regulation compliance with RoHS 3 and REACH, meeting global sustainability and safety standards.
• Long-term reliability due to stainless steel's inherent durability, minimizing replacement frequency and maintenance costs.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer delivers critical engineering value by addressing common industrial challenges such as galvanic corrosion, vibration-induced loosening, and uneven surface contact. Its corrosion-resistant material prevents degradation in outdoor, marine, or chemical processing applications, while the precise 0.344" ID and 1.25" OD dimensions ensure optimal load distribution for 5/16" screws. The flat profile and consistent thickness reduce point loading on soft materials, extending the service life of assembled components in automotive, construction, and machinery sectors. By integrating this precision washer, engineers achieve enhanced joint integrity and reduced long-term maintenance.

Specification Summary & Compliance

Manufactured to standard inch system dimensions with an ID of 0.344", OD of 1.25", and thickness range of 0.043-0.057". Designed for use with 5/16" screw size and constructed from 18-8 stainless steel. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and health safety standards for industrial fastening applications.