S-97913A112 0.28" ID x 0.45" 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, preventing loosening under extreme dynamic loads
• Exceptional corrosion protection with black zinc-flake coating that provides long-lasting performance in harsh industrial environments
• Enhanced durability with Rockwell C48 hardness rating, maintaining structural integrity under high-stress applications
• Precise dimensional fit with 0.28" ID and 0.45" OD engineered for perfect compatibility with 1/4" fasteners
• Reliable locking performance from wedge lock design that creates continuous tension, eliminating the need for additional locking devices
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Consistent thickness control between 0.090-0.110" ensuring uniform clamping force and surface contact

Professional Applications & Engineering Value

This heavy-duty wedge lock washer delivers critical vibration resistance in demanding industrial applications where fastener integrity is paramount. The black zinc-flake-coated steel construction provides superior corrosion protection, making it ideal for outdoor equipment, automotive assemblies, and machinery exposed to harsh environments. The top and bottom serrations create multiple biting edges that dig into both the fastener and surface, effectively preventing rotational loosening caused by vibration, thermal cycling, or dynamic loading. With Rockwell C48 hardness, this washer maintains its locking capability even under repeated stress cycles, eliminating the need for frequent retightening in critical joints. The combination of dual-sided serration technology and robust material properties makes this 1/4" wedge lock washer an essential component for maintaining structural integrity in vibration-prone assemblies.

Specification Summary & Compliance

This inch-system wedge lock washer features precise dimensional specifications including 0.28" ID, 0.45" OD, and thickness range of 0.090-0.110" specifically engineered for 1/4" screw applications. Manufactured from steel with black zinc-flake coating and hardened to Rockwell C48, the washer meets industrial standards for vibration-resistant fastening. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use across global markets.