S-91074A338 1.1" ID x 1.91" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual-sided serration technology that bites into both mating surfaces, preventing loosening under extreme dynamic loads.
• Exceptional durability and corrosion resistance provided by the zinc-flake coating, extending service life in harsh industrial environments.
• Reliable, high-strength performance ensured by the steel construction and a Rockwell C46 hardness rating, resisting deformation under high clamp loads.
• Optimal fit and secure fastening for 1" screws with a precise 1.1" ID and 1.91" OD, distributing load effectively.
• Consistent locking force from the wedge lock design that maintains tension and prevents back-off, reducing maintenance needs.
• Compliance with major environmental regulations, being RoHS 3 and REACH compliant, ensuring safe and responsible use in global supply chains.
• Versatile application in inch-system assemblies where heavy-duty, vibration-resistant locking is critical.

Professional Applications & Engineering Value

This zinc-flake-coated steel wedge lock washer is engineered to solve the critical problem of fastener loosening in high-vibration environments. Its top and bottom serrations create a powerful mechanical lock by embedding into both the bolt head/nut and the workpiece surface, effectively resisting rotational forces and shock loads. The Rockwell C46 hardness ensures the serrations do not wear down, maintaining locking performance over time. Made from robust steel with a protective zinc-flake coating, it offers excellent resistance to corrosion, making it ideal for industrial applications such as heavy machinery, automotive assemblies, construction equipment, and railway systems where reliability is non-negotiable. This washer provides long-term vibration resistance, reducing downtime and maintenance costs.

Specification Summary & Compliance

This washer features an Inside Diameter (ID) of 1.1", Outside Diameter (OD) of 1.91", and a Thickness of 0.170-0.190", designed for use with a 1" screw size in the inch system. It is manufactured from zinc-flake-coated steel with a hardness of Rockwell C46. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial components.