S-90850A150 0.349" ID x 0.703" OD ASME B18.21.1 General Purpose Washers
General Purpose 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 with zinc yellow-chromate plating, extending service life in harsh environments
- Exceptional load distribution from precise 0.349" ID and 0.703" OD dimensions, preventing surface damage
- High-strength performance with Grade 9 classification and Rockwell C40 hardness for demanding applications
- Reliable dimensional consistency manufactured to ASME B18.21.1 specifications for perfect fit
- Enhanced safety compliance meeting REACH environmental standards for industrial use
- Optimal thickness range (0.056-0.071") providing ideal compression and vibration resistance
- Heavy-duty construction specifically engineered for 5/16" fasteners in critical assemblies
Professional Applications & Engineering Value
This Grade 9 flat washer delivers critical engineering solutions where vibration resistance and corrosion protection are paramount. The zinc yellow-chromate plated steel construction creates a durable barrier against moisture and chemicals, significantly reducing maintenance frequency in industrial settings. With Rockwell C40 hardness and precise dimensional tolerances, these washers maintain clamping force under extreme loads, preventing joint loosening in heavy machinery, structural steel connections, and automotive assemblies. The ASME B18.21.1 compliance ensures consistent performance across batch productions, while the REACH-compliant manufacturing makes them suitable for regulated industries requiring environmental responsibility.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 standards with inch system dimensions: 0.349" ID, 0.703" OD, and 0.056-0.071" thickness range. Features Grade 9 strength classification with Rockwell C40 hardness for high-stress applications. Compliant with REACH (EC 1907/2006) regulations (06/14/2023, 235 SVHC) for environmental safety. Designed specifically for 5/16" screw sizes with zinc yellow-chromate plated steel construction providing corrosion resistance and durability.
