S-98019A231 0.288" ID x 0.44" OD MS51496-P77 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Passivated 18-8 Stainless Steel construction for extended service life in harsh environments
• Precise dimensional fit with 0.288" ID and 0.44" OD ensuring optimal load distribution and secure fastening
• Consistent thickness control (0.029-0.032") for uniform pressure distribution and vibration resistance
• Enhanced mechanical strength with Rockwell C20 hardness rating for reliable performance under heavy loads
• Military specification compliance with MS51496-P77 ensuring quality and interoperability in demanding applications
• Environmental regulation adherence through RoHS 3 and REACH compliance for safe global sourcing
• Universal compatibility with 1/4" screw sizes in inch measurement systems for simplified inventory management

Professional Applications & Engineering Value

This flat washer delivers exceptional engineering value through its passivated 18-8 stainless steel composition, specifically engineered to combat galvanic corrosion and chemical degradation in industrial environments. The precise 0.288" ID and 0.44" OD dimensions create an optimal bearing surface that prevents fastener embedding and distributes clamping forces evenly, solving common issues of joint loosening and material deformation. Meeting MS51496-P77 specifications, these washers provide reliable performance in machinery assembly, electrical enclosures, and structural applications where vibration resistance and long-term fastener integrity are critical. The controlled 0.029-0.032" thickness ensures consistent performance across production runs, making them ideal for OEM manufacturing and MRO operations requiring standardized, high-reliability components.

Specification Summary & Compliance

Manufactured to MS51496-P77 military specifications with precise dimensional tolerances for inch system applications. The washer features a 0.288" inner diameter, 0.44" outer diameter, and controlled thickness range of 0.029-0.032" for consistent performance. Material certification includes 18-8 stainless steel with passivated surface treatment and Rockwell C20 hardness rating. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe usage across global markets.