S-3118N17 0.344" 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 in harsh environments due to premium 316 stainless steel construction
- Precise 82° countersink angle ensures flush, professional finishes with flat-head screws
- Exceptional durability and deformation resistance from Rockwell B83 hardness rating
- Perfect compatibility with 5/16" fasteners through precise 0.344" inner diameter
- Optimal load distribution across 1.25" outer diameter for enhanced joint integrity
- Reliable thickness tolerance (0.198-0.218") guarantees consistent performance under pressure
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
These 316 stainless steel countersunk washers deliver critical performance in demanding industrial environments where corrosion resistance and chemical stability are paramount. The 82° countersink angle precisely matches standard flat-head screws, eliminating protrusions and creating smooth, aerodynamic surfaces in marine, chemical processing, and food-grade applications. Manufactured to inch system specifications with controlled thickness variations (0.198-0.218"), these washers maintain consistent clamping force while the Rockwell B83 hardness prevents deformation under heavy loads. The combination of precision dimensions and premium material makes these heavy-duty washers ideal for structural assemblies, machinery, and equipment exposed to moisture, chemicals, or temperature extremes.
Specification Summary & Compliance
This countersunk washer features inch system dimensions including 0.344" ID, 1.25" OD, and thickness range of 0.198-0.218" specifically designed for 5/16" screw sizes. The 82° countersink angle conforms to standard flat-head fastener requirements. Manufacturing complies with industry standards for dimensional accuracy and material properties, including Rockwell B83 hardness certification. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance for industrial applications.
