S-90850A120 0.945" ID x 1.78" OD General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 1.78" outer diameter preventing surface damage and material embedment
• Superior corrosion resistance through zinc yellow-chromate plating for extended service life in harsh environments
• High-strength performance with Grade 9 classification ensuring reliable performance under extreme pressure
• Precise fit and alignment with 7/8" inner diameter maintaining secure fastener positioning
• Enhanced durability from Rockwell C40 hardness resisting deformation under heavy loads
• Regulatory compliance assurance with REACH compliance meeting international safety standards
• Optimal thickness control between 0.146-0.174" providing consistent spacing and clamping force

Professional Applications & Engineering Value

This Grade 9 SAE flat washer delivers critical engineering solutions for heavy-duty industrial applications where failure is not an option. The zinc yellow-chromate plated steel construction provides superior corrosion protection in demanding environments including outdoor equipment, construction machinery, and automotive assemblies. With Rockwell C40 hardness, these washers maintain structural integrity under extreme vibration and load conditions, preventing loosening and maintaining bolt tension. The precise 7/8" inner diameter ensures perfect alignment with standard fasteners while the generous 1.78" outer diameter distributes clamping force effectively across softer materials. Engineered to SAE standards, these industrial washers solve common challenges of joint relaxation, surface damage, and corrosion-induced failure in critical bolted connections.

Specification Summary & Compliance

Manufactured to SAE standards with precise dimensional tolerances, this flat washer features 0.945" ID and 1.78" OD with thickness ranging 0.146-0.174". The zinc yellow-chromate plated steel construction meets Grade 9 strength classification with Rockwell C40 hardness verification. Compliant with REACH (EC 1907/2006) regulations as of 06/14/2023 (235 SVHC), ensuring environmental and workplace safety standards are maintained for industrial applications worldwide.