S-92908A666 0.281" ID x 1.25" OD Finishing Washers
Finishing Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Geometric Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance through black-oxide steel coating, extending service life in harsh industrial environments
- Precise 100° countersink angle ensures flush mounting with matching screw heads for improved safety and aesthetics
- Optimized dimensional stability with 1.25" OD and 0.281" ID providing perfect fit for 1/4" screws
- Enhanced load distribution through controlled thickness (0.271-0.291") preventing surface damage and joint failure
- Exceptional hardness rating (Rockwell 15N80) maintains structural integrity under heavy mechanical stress
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial applications
- Reduced installation time with inch system measurements compatible with standard North American tooling
Professional Applications & Engineering Value
These 100° countersunk washers deliver critical engineering solutions where flush surface mounting is essential. The black-oxide steel construction provides superior protection against rust and corrosion in demanding environments like outdoor equipment, automotive assemblies, and marine applications. The precise 1.25" outer diameter and 0.281" inner diameter work seamlessly with 1/4" screws to distribute clamping forces evenly, preventing material deformation and maintaining joint integrity. With Rockwell 15N80 hardness, these washers withstand repeated loading cycles without deformation, making them ideal for heavy machinery, structural frameworks, and precision manufacturing where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
Manufactured to exact inch system specifications with 1.25" OD, 0.281" ID, and controlled thickness range of 0.271-0.291". Features standard 100° countersink angle compatible with matching screw heads. Material hardness certified to Rockwell 15N80 standards. Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) regulations including SVHC requirements updated January 17, 2023.
