S-98019A515 0.688" ID x 1.75" OD MS15795-821; NASM15795; ASME B18.21.1 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional load distribution due to precise 0.688" ID and 1.75" OD dimensions, preventing surface damage and joint loosening
• Reliable hardness performance at Rockwell B70, ensuring dimensional stability under high stress and vibration
• Broad compatibility with 5/8" screws, simplifying sourcing and assembly in various mechanical applications
• Strict compliance with aerospace and industrial standards including MS15795-821, NASM15795, and ASME B18.21.1 for guaranteed quality
• Environmental and safety adherence through RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices
• Consistent thickness range of 0.108-0.160" for uniform performance and ease of installation in repetitive assemblies

Professional Applications & Engineering Value

This passivated 18-8 stainless steel flat washer is engineered to address critical challenges in demanding sectors such as aerospace, heavy machinery, and marine equipment. Its corrosion-resistant properties and robust Rockwell B70 hardness ensure longevity in environments exposed to moisture, chemicals, and high stress. By conforming to MS15795-821, NASM15795, and ASME B18.21.1 standards, it provides reliable load distribution and vibration resistance, preventing fastener failure and maintaining structural integrity. The precise 0.688" ID and 1.75" OD dimensions offer optimal fit for 5/8" screw applications, reducing installation errors and enhancing assembly efficiency in industrial settings.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.688", outer diameter of 1.75", and thickness ranging from 0.108" to 0.160", designed for use with 5/8" screws. Manufactured from passivated 18-8 stainless steel with a hardness of Rockwell B70, it meets stringent specifications including MS15795-821, NASM15795, and ASME B18.21.1. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to environmental and safety regulations for industrial and global supply chain requirements.