S-91074A136 0.79" ID x 1.21" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through wedge-lock design that maintains consistent clamping force under extreme conditions
• Dual-sided serration on both top and bottom surfaces provides maximum grip and prevents rotational loosening
• Exceptional durability with Rockwell C46 hardness rating ensuring long-term performance in demanding applications
• Corrosion protection from zinc-flake coating that extends service life in harsh industrial environments
• Precise dimensional compatibility with 0.79" ID and 1.21" OD designed specifically for 3/4" screw applications
• Regulatory compliance assurance meeting both RoHS 3 and REACH standards for global market acceptance
• Reliable locking performance that eliminates the need for additional locking devices, reducing assembly time and costs

Professional Applications & Engineering Value

This zinc-flake-coated steel wedge lock washer delivers critical vibration resistance in heavy machinery, construction equipment, and transportation applications where 3/4" screw assemblies face constant dynamic loads. The dual serration on top and bottom surfaces creates multiple biting points that dig into both the fastener and mating surface, effectively preventing rotational slippage that conventional washers cannot address. Engineered with Rockwell C46 hardness, this washer maintains its structural integrity under repeated stress cycles, eliminating the common failure points of softer locking washers. The wedge lock mechanism works by creating increasing clamping force as vibration attempts to loosen the joint, making it ideal for critical connections in mining equipment, agricultural machinery, and industrial processing systems where safety and reliability are paramount.

Specification Summary & Compliance

This wedge lock washer features precise dimensional specifications with 0.79" inner diameter, 1.21" outer diameter, and thickness ranging from 0.120" to 0.140" for optimal performance with 3/4" screw size applications. Manufactured from high-strength steel with zinc-flake coating for corrosion protection, the washer meets industry standards for inch system fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use in global markets. With Rockwell C46 hardness certification, this washer delivers consistent performance across demanding industrial applications.