S-93852A174 0.5" ID x 1.25" OD ASME B18.21.1 USS Washers
USS Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance from black-oxide 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced load distribution with 1.25" OD and 0.5" ID, preventing surface damage and loosening under vibration
- Exceptional durability with Rockwell B68 hardness, maintaining structural integrity under repeated stress
- Reliable dimensional precision manufactured to USS flat washer standards for consistent 7/16" screw compatibility
- Long-term environmental compliance meeting RoHS 3 and REACH regulations for safe global industrial use
- Optimized thickness range (0.064-0.104") providing ideal compression and spacing for various assembly requirements
- Industry-standard validation through ASME B18.21.1 compliance, ensuring mechanical reliability in critical applications
Professional Applications & Engineering Value
This black-oxide 18-8 stainless steel USS flat washer delivers critical engineering solutions where corrosion resistance and mechanical stability are paramount. The black-oxide surface treatment enhances both corrosion protection and aesthetic uniformity while maintaining the base material's strength. Engineered for 7/16" screw sizes in inch-system applications, it effectively distributes clamping force across wider surfaces (1.25" OD), preventing joint failure in vibrating machinery, structural steel connections, and outdoor equipment. The 18-8 stainless steel composition combined with controlled hardness (Rockwell B68) ensures reliable performance in chemical processing, marine hardware, and food processing equipment where moisture and corrosive agents degrade ordinary washers.
Specification Summary & Compliance
Manufactured to USS flat washer standards with precise dimensional control: 0.5" ID, 1.25" OD, and thickness ranging 0.064-0.104". Complies with ASME B18.21.1 mechanical specifications for dimensional and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming absence of restricted hazardous substances. Material certification includes 18-8 stainless steel with black-oxide finish and Rockwell B68 hardness verification.
