S-92908A130 0.188" ID x 0.75" OD Finishing Washers

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Black-oxide steel finish provides superior protection against rust and degradation in harsh industrial environments.
• Precise 82° Countersink Angle: Ensures a flush, professional finish with standard countersunk screw heads, eliminating protrusions and improving safety.
• Optimized for No. 8 Screws: 0.188" inner diameter guarantees a secure, snug fit, preventing loosening under vibration and dynamic loads.
• High Hardness Rating: Rockwell 15N80 hardness ensures excellent durability and resistance to deformation under high-pressure applications.
• Consistent Thickness Control: 0.115-0.135" thickness provides reliable load distribution and spacing accuracy in assembled components.
• Broad Outer Diameter Coverage: 0.75" OD offers a large bearing surface, reducing surface pressure and preventing material damage.
• Full Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safe, environmentally responsible use in global supply chains.

Professional Applications & Engineering Value

This 82° countersunk washer is engineered to address critical challenges in industrial assembly, where flush mounting and corrosion resistance are paramount. The black-oxide steel construction provides a robust barrier against moisture, chemicals, and oxidation, extending service life in demanding sectors like automotive, machinery, and outdoor equipment. Its precise countersink angle ensures seamless integration with standard fasteners, eliminating gaps and reducing stress concentrations. Designed specifically for No. 8 screw sizes, it maintains clamping force and alignment in vibration-prone applications, while the controlled thickness ensures uniform pressure distribution. Ideal for OEMs and maintenance teams requiring reliable, RoHS and REACH compliant components that meet stringent industry standards without compromising performance.

Specification Summary & Compliance

This washer features an 82° countersink angle with an inner diameter of 0.188", outer diameter of 0.75", and thickness ranging from 0.115" to 0.135", designed for No. 8 screws in the inch measurement system. It is manufactured from black-oxide steel with a hardness of Rockwell 15N80 to ensure dimensional stability and strength. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) regulations, including the latest SVHC updates, confirming its suitability for industrial and international markets.