S-90377A213 0.812" ID x 1.75" OD Oversized Washers
Oversized 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 18-8 stainless steel construction with black-oxide coating, ideal for humid or chemically aggressive environments
- Precise dimensional fit with 0.812" ID and 1.75" OD ensuring optimal load distribution for 3/4" screw applications
- Enhanced durability with consistent 0.230-0.270" thickness providing reliable performance under repeated stress
- Environmental compliance assurance meeting RoHS 3 and REACH standards for safe, sustainable industrial use
- Broad industrial compatibility designed for inch-system machinery and equipment requiring standardized flat washers
- Reduced maintenance needs thanks to stainless steel's inherent resistance to rust and degradation
Professional Applications & Engineering Value
This black-oxide 18-8 stainless steel flat washer delivers critical engineering solutions where corrosion resistance and dimensional precision are paramount. The 0.812" ID provides exact alignment with 3/4" screws, preventing bolt loosening in vibrating machinery, while the 1.75" OD distributes clamping force effectively to protect soft materials from damage. In marine, chemical processing, and outdoor infrastructure applications, the black-oxide coating enhances surface durability while maintaining the stainless steel's natural corrosion resistance. These industrial washers withstand harsh environments where carbon steel components would fail, reducing replacement frequency and maintenance costs in heavy-duty assemblies.
Specification Summary & Compliance
Manufactured to standard inch system dimensions: 0.812" inner diameter, 1.75" outer diameter, and 0.230-0.270" thickness range for consistent performance. Constructed from 18-8 stainless steel with black-oxide surface treatment for enhanced protection. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to strict international standards for hazardous substance restrictions.
