S-93852A172 0.375" ID x 0.875" 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
- Exceptional corrosion resistance with black-oxide coated 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise dimensional fit with 0.375" ID and 0.875" OD ensuring perfect compatibility with 5/16" screws
- Enhanced load distribution through uniform thickness (0.064-0.104") preventing surface damage and joint loosening
- Superior mechanical strength with Rockwell B68 hardness maintaining structural integrity under heavy loads
- Industry-standard compliance with ASME B18.21.1 specifications guaranteeing consistent performance and interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance meeting global regulatory requirements
- Long-term reliability with stainless steel material resisting rust and degradation in demanding applications
Professional Applications & Engineering Value
These USS flat washers deliver critical engineering solutions where corrosion resistance and load distribution are paramount. The black-oxide 18-8 stainless steel construction provides superior protection against chemical exposure and atmospheric corrosion, making them ideal for marine, chemical processing, and outdoor infrastructure applications. The precise 0.375" ID ensures secure seating on 5/16" screws while the 0.875" OD maximizes surface contact area, preventing embedment and maintaining bolt preload in vibrating environments. With Rockwell B68 hardness, these washers withstand repeated assembly cycles without deformation, reducing maintenance costs and extending equipment service life across industrial machinery, structural frameworks, and heavy equipment assemblies.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 standards with inch system dimensions: 0.375" inner diameter, 0.875" outer diameter, and thickness range of 0.064-0.104". The washers maintain standard USS flat washer geometry and dimensional tolerances. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance for industrial distribution and OEM applications.
