S-92908A356 0.188" ID x 0.75" OD Finishing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide Steel finish, ideal for harsh industrial environments
• Precise 100° countersink angle ensures flush mounting and eliminates protrusion for smooth surfaces
• High durability with Rockwell 15N80 hardness, providing long-lasting performance under load
• Perfect fit for No. 8 screws with 0.188" ID and 0.75" OD, ensuring secure fastening and vibration resistance
• Consistent thickness (0.115-0.135") for uniform pressure distribution and reduced risk of loosening
• Compliance with RoHS 3 and REACH standards, meeting global environmental and safety regulations
• Inch system compatibility for seamless integration with existing North American machinery and components

Professional Applications & Engineering Value

This 100° countersunk washer in Black-Oxide Steel is engineered to address critical challenges in industrial assembly, such as corrosion, misalignment, and fastener failure. The 100° countersink angle allows screws to sit flush, preventing snagging and improving safety in machinery and equipment. Made from high-hardness steel (Rockwell 15N80), it withstands repetitive stress and harsh conditions, making it ideal for automotive, construction, and aerospace applications where No. 8 screw compatibility is essential. The black-oxide coating enhances corrosion resistance, extending service life in humid or chemically exposed environments, while the precise dimensions ensure reliable performance in precision washers assemblies.

Specification Summary & Compliance

This washer features standard inch measurements with an ID of 0.188", OD of 0.75", and thickness range of 0.115-0.135", designed for No. 8 screw size applications. It adheres to common industrial standards for countersunk washers, including material and dimensional consistency. Compliance includes RoHS 3 (2015/863/EU) with exemption 6(a) for lead as an alloying element in steel, and REACH (EC 1907/2006) conformity as of January 17, 2023, ensuring environmental and regulatory safety.