S-98019A335 0.25" ID x 0.562" OD MS15795-809; NASM15795; ASME B18.21.1 Mil. Spec. Washers
Mil. Spec. Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
- Optimal load distribution with precise 0.25" ID and 0.562" OD dimensions, preventing surface damage and fastener loosening
- Enhanced mechanical durability with Rockwell B70 hardness, maintaining structural integrity under repeated stress
- Guaranteed dimensional accuracy through compliance with MS15795-809, NASM15795, and ASME B18.21.1 standards
- Perfect compatibility with No. 12 screws, ensuring secure fastening in industrial assemblies
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe global usage
- Consistent thickness control (0.051-0.080") for uniform pressure distribution across mating surfaces
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these passivated 18-8 stainless steel flat washers provide critical protection against galvanic corrosion and chemical degradation. The precise 0.25" ID and 0.562" OD dimensions ensure perfect alignment with No. 12 screw applications while distributing clamp load effectively to prevent surface indentation and joint failure. With Rockwell B70 hardness, these washers maintain dimensional stability under vibration and thermal cycling, making them ideal for aerospace, marine, and chemical processing equipment where MS15795-809 and NASM15795 compliance is mandatory. The passivation surface treatment creates a protective oxide layer that significantly extends service life in corrosive environments.
Specification Summary & Compliance
Manufactured to exacting ASME B18.21.1 dimensional standards with precise thickness control between 0.051-0.080". These inch system flat washers meet all requirements of MS15795-809 and NASM15795 military specifications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance. The 18-8 stainless steel material with passivation treatment provides consistent performance across temperature variations and corrosive conditions.
