S-98019A310 0.125" ID x 0.312" OD MS15795-804; NASM15795; ASME B18.21.1 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to passivated 18-8 stainless steel construction, ideal for harsh environments
• Excellent load distribution with precise 0.125" ID and 0.312" OD dimensions, preventing surface damage
• Consistent performance ensured by Rockwell B70 hardness for reliable mechanical strength
• Perfect fit for No. 4 screws with controlled 0.025-0.040" thickness, reducing assembly errors
• Full regulatory compliance with RoHS 3 and REACH, meeting global environmental standards
• Interchangeable reliability through adherence to MS15795-804, NASM15795, and ASME B18.21.1 standards
• Long service life due to durable material and precise manufacturing, minimizing replacement needs

Professional Applications & Engineering Value

This flat washer in passivated 18-8 stainless steel addresses critical industrial challenges, such as corrosion in humid or chemical-exposed settings. Its precise inch dimensions (0.125" ID x 0.312" OD) and controlled thickness ensure uniform load distribution, preventing fastener loosening and material fatigue in No. 4 screw applications. Engineered to MS15795-804, NASM15795, and ASME B18.21.1 specifications, it guarantees compatibility and safety in aerospace, automotive, and machinery assemblies. The Rockwell B70 hardness provides consistent performance under vibration and stress, reducing maintenance costs and enhancing operational reliability for industrial washers in demanding environments.

Specification Summary & Compliance

This washer maintains tight dimensional tolerances per ASME B18.21.1 and military standards MS15795-804 and NASM15795, ensuring precise fit and function. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (updated 06/14/2023), meeting stringent environmental and safety regulations for global industrial use.