S-98019A326 0.188" ID x 0.438" OD MS15795-841; 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 and extended service life.
• Exceptional mechanical strength with Rockwell B70 hardness, providing reliable load distribution and resistance to deformation under pressure.
• Precise dimensional fit with 0.188" ID and 0.438" OD, ensuring optimal alignment and secure fastening for No. 8 screws.
• Consistent performance guaranteed by compliance with MS15795-841, NASM15795, and ASME B18.21.1 standards for quality and interchangeability.
• Enhanced durability through controlled thickness (0.036-0.065"), reducing wear and maintaining fastener integrity in demanding applications.
• Environmental and regulatory safety with full RoHS 3 and REACH compliance, meeting global standards for hazardous substance restrictions.
• Versatile industrial use due to inch system measurements, making it suitable for a wide range of machinery and equipment assemblies.

Professional Applications & Engineering Value

This flat washer is engineered from passivated 18-8 stainless steel to address critical challenges in industrial settings, such as corrosion from moisture, chemicals, and outdoor exposure. Its robust material and Rockwell B70 hardness ensure it withstands high-stress conditions without cracking or losing shape, providing reliable load distribution for No. 8 screw size fastenings. Commonly used in aerospace, automotive, and heavy machinery, this washer prevents loosening and surface damage, extending the life of assemblies. The precise 0.188" ID and 0.438" OD dimensions facilitate easy installation and secure fit, reducing maintenance needs and downtime in demanding applications.

Specification Summary & Compliance

This washer features inch-based dimensions with an ID of 0.188", OD of 0.438", and thickness range of 0.036-0.065", adhering to standard tolerances for consistent performance. It conforms to MS15795-841, NASM15795, and ASME B18.21.1 specifications, ensuring high-quality manufacturing and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global use.