S-91525A331 0.5" ID x 1.125" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh chemical and marine environments
• Exceptional durability with Rockwell B68 hardness rating for long-lasting performance under heavy loads
• Precise fit for 7/16" screws with 0.5" ID ensuring secure fastening and optimal load distribution
• Robust load-bearing surface with 1.125" OD providing excellent stability and preventing surface damage
• Consistent thickness control (0.110-0.140") for uniform pressure distribution and reliable assembly performance
• Environmental compliance assurance with RoHS 3 and REACH standards for safe, regulated industrial use
• Heavy-duty inch system compatibility designed for demanding industrial applications requiring imperial measurements

Professional Applications & Engineering Value

These 316 stainless steel flat washers deliver critical engineering value in applications where corrosion resistance and structural integrity are paramount. The marine-grade 316 stainless steel composition provides exceptional protection against chlorides, acids, and industrial chemicals, solving common failure points in chemical processing, marine hardware, and food processing equipment. With Rockwell B68 hardness, these washers maintain dimensional stability under sustained pressure, preventing deformation in high-vibration environments. The precise 0.5" ID ensures perfect alignment with 7/16" screws, while the generous 1.125" OD distributes clamp load effectively across softer materials. This combination of material excellence and dimensional precision makes them ideal for critical industrial washers applications requiring reliable, long-term performance in corrosive or high-stress conditions.

Specification Summary & Compliance

This flat washer features inch system dimensions with 0.5" internal diameter, 1.125" outer diameter, and controlled thickness between 0.110-0.140". Manufactured to standard flat washer specifications for 7/16" screw applications with consistent dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards (updated through 06/14/2023, 235 SVHC), ensuring environmental safety and regulatory acceptance for industrial and commercial use worldwide.