S-92908A135 0.188" ID x 1" OD Finishing Washers

Key Features & Benefits at a Glance

• Flush surface installation with 82° countersink angle for seamless integration and reduced snagging in industrial applications
• Enhanced corrosion resistance through black-oxide steel coating, extending service life in demanding environments
• Precise dimensional fit with 1" OD and 0.188" ID ensuring reliable performance with No. 8 screws
• Superior mechanical strength from Rockwell 15N80 hardness, providing consistent load distribution and vibration resistance
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Optimized thickness range (0.115-0.135") for balanced compression and joint integrity in heavy-duty assemblies

Professional Applications & Engineering Value

These 82° countersunk washers deliver critical engineering solutions where flush mounting is essential for safety and performance. The black-oxide steel construction provides superior corrosion protection in industrial environments, while the precise 1" outer diameter and 0.188" inner diameter ensure perfect alignment with No. 8 screws in machinery, automotive, and structural applications. The Rockwell 15N80 hardness maintains dimensional stability under load, preventing deformation in high-stress assemblies. Ideal for aerospace components, manufacturing equipment, and outdoor infrastructure where surface smoothness and environmental resistance are paramount.

Specification Summary & Compliance

Manufactured to inch system specifications with 82° countersink angle and dimensional tolerances maintained for industrial applications. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead alloying in steel and REACH (EC 1907/2006) standards as of January 2023. The black-oxide surface treatment and Rockwell 15N80 hardness rating ensure consistent performance across temperature variations and mechanical stresses.