S-97449A102 Steel Pronged Lock Washers for Square-Neck Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Exceptional mechanical strength from Rockwell B47 hardness, preventing deformation under high-load applications
• Precise square hole fit for 5/16" screws, ensuring secure fastening and preventing rotation during installation
• Optimized load distribution with 1.1" outer diameter, reducing surface pressure and material stress
• Reliable dimensional stability with consistent 0.041-0.053" thickness, maintaining uniform clamping force
• Enhanced safety compliance meeting RoHS 3 and REACH regulations for environmentally responsible manufacturing
• Versatile inch system compatibility for seamless integration with standard North American equipment and components

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this square hole washer delivers critical performance advantages in machinery assembly, structural frameworks, and heavy equipment manufacturing. The zinc-plated steel construction provides essential corrosion resistance against moisture, chemicals, and environmental exposure, while the Rockwell B47 hardness ensures the washer maintains its structural integrity under sustained vibration and torque loads. The precisely machined square hole design (0.345" inside width) prevents screw rotation during tightening operations, a common challenge in high-torque applications. This combination of material properties and geometric precision makes it ideal for automotive, construction, and manufacturing sectors where reliable fastening solutions are paramount for operational safety and equipment longevity.

Specification Summary & Compliance

This square hole washer features inch system dimensions including 1.1" OD and thickness range of 0.041-0.053" with 0.345" inside width specifically engineered for 5/16" screws. Manufactured to precise dimensional standards with Rockwell B47 hardness for consistent mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety standards are met for industrial applications worldwide.