S-3118N16 0.281" ID x 1.25" OD Finishing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction, ideal for marine, chemical, and outdoor applications.
• Perfect flush-mounting with an 82° countersink angle, ensuring a smooth, professional finish and preventing snagging.
• Exceptional durability and load distribution from a Rockwell B83 hardness rating, providing reliable performance in heavy-duty fastening.
• Precise fit for 1/4" screws with a 0.281" inner diameter, ensuring secure, vibration-resistant connections.
• Optimized surface coverage and stability with a large 1.25" outer diameter, reducing surface pressure and material stress.
• Consistent dimensional accuracy with a thickness range of 0.271" to 0.291", guaranteeing uniform performance in assembly.
• Compliance with global safety and environmental standards, including RoHS 3 and REACH, for responsible and regulated industrial use.

Professional Applications & Engineering Value

This 316 Stainless Steel Countersunk Washer is engineered to solve critical challenges in demanding industrial settings. Its high-corrosion-resistant 316 stainless steel material prevents degradation from moisture, chemicals, and salt spray, making it indispensable in marine hardware, chemical processing equipment, and coastal infrastructure. The 82° countersink angle allows screws to sit flush with surfaces, eliminating protrusions that could cause injury or impede machinery operation. Designed for 1/4" screw applications, it ensures a precise fit that minimizes loosening under vibration, enhancing the longevity of assemblies in heavy-duty machinery, structural frameworks, and transportation equipment. This washer delivers reliable structural integrity where failure is not an option.

Specification Summary & Compliance

This washer conforms to inch system measurements with an ID of 0.281", OD of 1.25", and thickness of 0.271-0.291", ensuring dimensional precision for 1/4" screw compatibility. It is manufactured to high-quality standards with a Rockwell B83 hardness for consistent mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its safety for industrial use and adherence to environmental directives.