S-97913A117 0.53" ID x 0.77" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual-sided serrations that bite into mating surfaces to prevent loosening under extreme conditions
• Enhanced corrosion protection with black zinc-flake coating that provides long-lasting durability in harsh industrial environments
• Exceptional hardness and strength with Rockwell C48 hardened steel construction that maintains locking performance under heavy loads
• Precise dimensional compatibility with 0.53" ID and 0.77" OD designed specifically for 1/2" screw applications
• Reliable locking performance through wedge-action design that creates constant tension and prevents joint failure
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use across regulated industries
• Consistent thickness control between 0.090-0.110" ensuring uniform clamping force and installation reliability

Professional Applications & Engineering Value

This black zinc wedge lock washer delivers critical engineering solutions for applications where vibration-induced loosening poses significant safety and performance risks. The dual serration design on both top and bottom surfaces creates multiple biting points that dig into both the fastener and workpiece, effectively resisting rotational forces that cause conventional washers to fail. The zinc-flake coated steel construction provides superior corrosion resistance compared to standard zinc plating, making these heavy-duty lock washers ideal for outdoor equipment, automotive assemblies, construction machinery, and industrial manufacturing where environmental exposure is a concern. The Rockwell C48 hardness ensures the serrations maintain their bite through repeated stress cycles, while the precise 0.53" ID guarantees perfect fitment on 1/2" screws in inch-system applications.

Specification Summary & Compliance

This wedge lock washer features precise dimensional specifications including 0.53" inner diameter, 0.77" outer diameter, and thickness ranging from 0.090" to 0.110". Manufactured from hardened steel with Rockwell C48 hardness, the washer incorporates dual serrations on both top and bottom surfaces. The product is coated with black zinc-flake for enhanced corrosion protection and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across various industrial applications while meeting international regulatory requirements.