S-98019A500 0.438" ID x 1" OD MS15795-815; NASM15795; ASME B18.21.1 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from Passivated 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Precise dimensional fit with 0.438" ID and 1" OD ensuring reliable performance with 3/8" fasteners
• Enhanced load distribution through controlled 0.064-0.104" thickness range, minimizing surface damage
• Exceptional mechanical durability with Rockwell B70 hardness for long-term reliability under stress
• Guaranteed interchangeability through compliance with MS15795-815, NASM15795, and ASME B18.21.1 standards
• Environmental compliance assurance with RoHS 3 and REACH regulations for global supply chain compatibility
• Optimized for heavy-duty applications where precision flat washers are critical for assembly integrity

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these passivated 18-8 stainless steel flat washers provide critical protection against galvanic corrosion and chemical degradation in marine, chemical processing, and outdoor equipment. The precision 0.438" ID x 1" OD dimensions ensure perfect alignment with 3/8" screw sizes, preventing loosening and maintaining clamp load in vibrating environments. With Rockwell B70 hardness, these washers resist deformation under high torque applications, while the controlled thickness range guarantees consistent performance in stacked assemblies. Ideal for aerospace, automotive, and heavy machinery where MS15795-815 compliance and corrosion resistance are mandatory for operational safety and longevity.

Specification Summary & Compliance

Manufactured to exacting standards with dimensional tolerances per ASME B18.21.1 specifications. The flat washers meet military standard MS15795-815 and NASM15795 requirements for material and dimensional consistency. 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 composition with passivation treatment provides superior surface protection while maintaining mechanical properties specified in applicable industrial standards.