S-97449A104 Steel Pronged Lock Washers for Square-Neck Carriage Bolts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Superior load distribution from the 1.75" outer diameter, preventing surface damage and material embedment
• Secure anti-rotation performance thanks to the square hole design that locks firmly with square-neck bolts
• Optimized mechanical strength with Rockwell B47 hardness rating for reliable performance under vibration and stress
• Precision dimensional fit with 0.535" inside width specifically engineered for 1/2" screw applications
• Consistent thickness control between 0.057-0.069" ensures uniform clamping force across assemblies
• Environmental compliance assurance meeting both RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

This square hole washer delivers critical engineering solutions for industrial applications where vibration resistance and secure fastening are paramount. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, construction machinery, and structural assemblies exposed to harsh conditions. The specialized square hole design prevents rotation during installation and operation, making it ideal for high-vibration environments where standard washers might loosen. With its substantial 1.75" OD and precise 0.535" inside width, this washer effectively distributes clamping forces for 1/2" screw applications in heavy machinery, structural steel connections, and industrial equipment where load distribution and joint integrity are critical. The combination of material durability and geometric precision addresses common failure points in mechanical assemblies.

Specification Summary & Compliance

This square hole washer features inch system dimensions with 1.75" outer diameter, 0.535" inside width, and thickness range of 0.057-0.069". Manufactured from zinc-plated steel with Rockwell B47 hardness, it's engineered specifically for 1/2" screw applications. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, meeting the latest regulatory requirements for industrial components.