S-91860A032 0.5" ID x 1.25" OD ASME B18.21.1 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance provided by 17-7 PH stainless steel, ensuring long-term reliability in harsh environments
• Exceptional strength and durability with Rockwell C40 hardness, resisting deformation under high-load applications
• Precise dimensional accuracy with 0.5" ID and 1.25" OD, ensuring perfect fit for 7/16" screw sizes
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing consistent performance and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH standards, making them suitable for regulated industries
• Optimized load distribution through controlled thickness (0.073-0.083"), protecting surfaces and preventing fastener loosening
• Reliable inch system compatibility for seamless integration with existing industrial equipment and fastening systems

Professional Applications & Engineering Value

This 17-7 PH stainless steel flat washer delivers exceptional engineering value in demanding industrial environments where corrosion resistance and mechanical strength are critical. The precipitation-hardening stainless steel construction provides superior performance in chemical processing, marine applications, and outdoor equipment where moisture and corrosive elements are present. The precise 0.5" inner diameter and 1.25" outer diameter ensure optimal load distribution for 7/16" screw sizes, preventing surface damage and maintaining joint integrity under vibration and thermal cycling. With Rockwell C40 hardness, these washers maintain their structural integrity in heavy-duty applications, making them ideal for machinery, structural assemblies, and equipment requiring reliable, long-lasting fastening solutions that withstand extreme operating conditions.

Specification Summary & Compliance

This flat washer features precise dimensional specifications including 0.5" inner diameter, 1.25" outer diameter, and thickness range of 0.073-0.083". Manufactured to ASME B18.21.1 standards for dimensional consistency and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, including the latest SVHC updates as of January 17, 2022. Designed specifically for use with 7/16" screw sizes in inch measurement systems, ensuring proper fit and function in industrial applications requiring standardized components.