S-91117A243 0.812" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Exceptional load distribution with 3" outer diameter providing maximum surface coverage and protection for 3/4" screw applications
• Precise dimensional fit with 0.812" inner diameter ensuring perfect alignment and secure fastening performance
• Consistent thickness control between 0.360-0.390" for uniform pressure distribution and reliable assembly results
• Enhanced mechanical strength with Rockwell B40 hardness rating for durable performance under heavy loads
• Full regulatory compliance meeting RoHS 3 and REACH standards for safe, environmentally responsible manufacturing
• Heavy-duty construction designed specifically for demanding industrial applications requiring maximum durability

Professional Applications & Engineering Value

This heavy-duty flat washer delivers exceptional engineering value through its zinc-plated steel construction and precise dimensional specifications. The 3" outer diameter provides superior load distribution for 3/4" screw size applications, preventing surface damage and maintaining structural integrity in high-stress assemblies. The corrosion-resistant zinc plating ensures long-term reliability in industrial environments where moisture and chemical exposure are concerns. With consistent thickness between 0.360-0.390", this industrial-grade washer maintains uniform pressure across mating surfaces, reducing stress concentration points and preventing joint failure. Ideal for construction equipment, heavy machinery, structural steel connections, and industrial manufacturing applications requiring durable mechanical fasteners that withstand vibration and heavy loading conditions.

Specification Summary & Compliance

This flat washer features inch system measurements with 3" outer diameter, 0.812" inner diameter, and thickness range of 0.360-0.390". Manufactured from zinc-plated steel with Rockwell B40 hardness rating, it complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) compliance standards as of January 17, 2023. Designed specifically for 3/4" screw applications, this washer ensures dimensional accuracy and reliable performance in industrial fastening systems.