Value Collection MP31513 Wedge Lock Washer Steel Grade 2

Product Description

The VALUE COLLECTION MP31513 is a wedge lock washer designed to maintain secure fastener tension in bolted assemblies subject to vibration, dynamic loading, or thermal cycling. Manufactured from Grade 2 steel with a zinc flake finish over zinc plating, it provides corrosion resistance suitable for general industrial and mechanical applications. The washer fits a 5/16-inch or M8 thread with an outside diameter of 0.534 inches and an inside diameter ranging from 0.336 to 0.344 inches. Its wedge-profile mating faces create a locking action that resists loosening under load. Sold in packs of 25, this washer is installed by maintenance technicians, millwrights, and mechanical contractors across a wide range of bolted joint applications.

This washer is suited for use in general mechanical assemblies, HVAC equipment mounting, electrical enclosure hardware, and light structural connections where vibration-induced fastener loosening is a concern. The inch-system dimensions and 5/16-inch thread compatibility make it a straightforward fit in standard North American fastener assemblies. The zinc-plated zinc flake finish offers moderate environmental protection for indoor and sheltered outdoor installations.

Key Features

• Wedge-profile locking geometry resists fastener loosening under vibration and dynamic load
• Grade 2 steel construction provides reliable mechanical strength for general-duty applications
• Zinc-plated with zinc flake finish for corrosion resistance
• Fits 5/16-inch (M8) threaded fasteners; OD 0.534 inches, ID 0.336 to 0.344 inches
• Compliant with ISO 14001 and ISO 9001 manufacturing standards
• Sold in a pack of 25 with a minimum order quantity of 1 pack

Compatibility

Designed as a standard wedge lock washer for 5/16-inch (M8) bolted assemblies using inch-system fasteners in general industrial, mechanical, and HVAC applications.

Installation Notes

Wedge lock washers are installed in pairs with the serrated faces mating against each other, placed between the fastener bearing surface and the joint material. Ensure mating surfaces are clean and free of debris before assembly. Follow applicable torque specifications from the fastener or equipment manufacturer for the bolt size and material grade in use. De-energize and lock out any equipment before servicing fastened assemblies on powered systems.