S-91717A205 0.531" ID x 1.25" OD Clipped Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through black-oxide steel surface treatment, extending service life in demanding environments
• Optimized load distribution with precise 0.531" ID and 1.25" OD dimensions for secure 1/2" screw applications
• Superior mechanical strength backed by Rockwell B40 hardness rating for reliable performance under pressure
• Quick installation advantage with clipped design (1.07" width) enabling faster assembly than standard washers
• Consistent thickness control (0.084-0.097") ensures uniform clamping force and vibration resistance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global industrial use
• Durable steel construction provides long-term reliability in heavy-duty mechanical applications

Professional Applications & Engineering Value

These black-oxide steel clipped washers deliver critical engineering solutions where standard washers fall short. The clipped design enables rapid installation in high-volume assembly operations while maintaining full functional performance. The black-oxide surface treatment creates a protective barrier against oxidation and corrosion, making these industrial washers ideal for outdoor equipment, automotive assemblies, and machinery exposed to moisture. With precise 0.531" ID matching standard 1/2" screw sizes, they eliminate play and prevent loosening under vibration. The Rockwell B40 hardness ensures consistent performance in load-bearing applications without deformation, while the controlled 0.084-0.097" thickness guarantees proper joint compression. These precision washers solve common assembly challenges by combining installation efficiency with mechanical reliability.

Specification Summary & Compliance

Manufactured to exact inch system specifications: 0.531" ID, 1.25" OD, and 1.07" clipped width with thickness tolerance of 0.084-0.097". The black-oxide steel construction meets Rockwell B40 hardness standards for consistent mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates. Designed specifically for use with 1/2" screw sizes in industrial fastening applications requiring reliable corrosion protection and dimensional precision.