S-98189A200 0.312" ID x 0.734" OD ASME B18.21.1 General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from A286 stainless steel construction, ideal for harsh industrial environments
• Superior mechanical strength with Rockwell C22 hardness for reliable load distribution and long service life
• Precise USS dimensional compliance ensures perfect fit with 1/4" fasteners and optimal surface contact
• Enhanced durability through controlled thickness (0.051-0.080") providing consistent performance under vibration
• Industry-standard reliability with full ASME B18.21.1 specification compliance for engineering applications
• Environmental compliance meeting RoHS 3 and REACH regulations for global industrial use
• Optimized load bearing with 0.734" OD providing excellent surface coverage and stress distribution

Professional Applications & Engineering Value

These A286 stainless steel USS flat washers deliver critical engineering solutions where standard washers fail. The premium A286 material maintains structural integrity in high-temperature and corrosive environments common in chemical processing, marine, and aerospace applications. The precise 1/4" ID and 0.734" OD dimensions ensure perfect alignment with mating components while the controlled thickness range prevents loosening under vibration. Meeting ASME B18.21.1 standards, these flat washers provide reliable performance in bolted connections subject to thermal cycling and mechanical stress, making them ideal for industrial equipment, heavy machinery, and critical infrastructure where failure is not an option.

Specification Summary & Compliance

Manufactured to USS designation standards with precise dimensional tolerances including 0.312" ID, 0.734" OD, and thickness range of 0.051-0.080". Complies with ASME B18.21.1 mechanical specifications and features Rockwell C22 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial applications worldwide.