S-91434A121 0.594" ID x 1.188" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with precise 0.594" ID and 1.188" OD dimensions to prevent surface damage and maintain joint integrity under high stress
• Superior corrosion resistance provided by the black protective coating, extending service life in harsh industrial environments
• High hardness rating of Rockwell C38 ensures minimal deformation and reliable performance in heavy-duty applications
• Grade 8 strength classification guarantees consistent performance in demanding mechanical assemblies requiring high clamp load retention
• Standardized SAE design ensures compatibility with 9/16" fasteners and seamless integration into existing inch-system equipment
• Regulatory compliance with RoHS 3 and REACH environmental standards for safe use in global industrial supply chains
• ASME B18.21.1 compliance delivers guaranteed dimensional accuracy and mechanical properties for engineering-critical applications

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 SAE flat washer solves critical challenges in machinery assembly, construction equipment, and automotive systems where vibration resistance and joint stability are paramount. The black corrosion-resistant coated steel construction prevents galvanic corrosion while maintaining Rockwell C38 hardness under extreme pressure. Its ASME B18.21.1 compliant design ensures perfect fitment with 9/16" fasteners, eliminating loosening in dynamic load conditions. The optimized thickness range (0.100-0.116") provides ideal spring compression for permanent fastener seating, making it indispensable for high-torque applications in manufacturing and maintenance operations.

Specification Summary & Compliance

This washer maintains ASME B18.21.1 dimensional standards with precise inner diameter (0.594"), outer diameter (1.188"), and controlled thickness (0.100-0.116") for 9/16" screw size compatibility. Manufactured from Grade 8 steel with Rockwell C38 hardness verification, it meets rigorous mechanical property requirements. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance for industrial fastener applications.