S-91117A251 1.062" ID x 3.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Optimal load distribution from the large 3.5" outer diameter, preventing surface damage and maintaining joint integrity
• Precise fit for 1" screws with 1.062" inner diameter, ensuring secure fastening without play or misalignment
• Consistent performance guaranteed by Rockwell B40 hardness rating, providing reliable strength and deformation resistance
• Enhanced durability through controlled 0.110-0.140" thickness range, offering optimal balance between flexibility and rigidity
• Global compliance assurance with RoHS 3 and REACH standards, meeting international environmental and safety regulations
• Versatile inch system compatibility for seamless integration with existing industrial equipment and fastener systems

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for heavy-duty applications where vibration resistance and surface protection are paramount. The zinc plating creates a protective barrier against corrosion in harsh environments, while the substantial 3.5" outer diameter effectively distributes clamping force across wider surfaces, preventing material indentation and maintaining structural integrity. Engineered specifically for 1" screw size applications, the precise 1.062" inner diameter ensures perfect alignment and secure fastening in construction, machinery assembly, and industrial equipment. The Rockwell B40 hardness provides optimal balance between strength and malleability, resisting deformation under heavy loads while maintaining necessary flexibility for proper seating. These industrial washers are indispensable for applications requiring reliable performance in structural steel connections, heavy machinery, and outdoor equipment where environmental factors and mechanical stress are constant challenges.

Specification Summary & Compliance

This flat washer features inch system dimensions with 1.062" inner diameter, 3.5" outer diameter, and 0.110-0.140" thickness range for precise fitment. Manufactured to standard flat washer specifications for 1" screw size applications with Rockwell B40 hardness rating. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) compliance with 233 SVHC substances as of 01/17/2023, ensuring adherence to international environmental and safety standards for industrial components.