Value Collection 742056PS Internal Tooth Lock Washer M3

Product Description

The VALUE COLLECTION 742056PS is an internal tooth lock washer designed for use with M3 screws. It features a 3.2mm inside diameter and a 6.0mm outside diameter, with a thickness of 0.4mm. Manufactured from Grade 2 spring steel with a zinc-plated finish, this washer uses inward-facing serrated teeth to bite into both the fastener bearing surface and the mating material, resisting loosening caused by vibration and torque. It is a standard hardware component installed by electricians, HVAC technicians, machinists, and general maintenance professionals across a wide range of assembly and equipment applications.

This internal tooth lock washer is suited for light-duty fastening applications where M3 metric screws are used. Typical installations include electrical enclosures, control panels, small appliances, HVAC equipment housings, and electronic assemblies. The zinc plating provides basic corrosion resistance for indoor and protected outdoor environments. It is not rated to meet military specifications. Minimum order quantity is 200 pieces per order.

Key Features

• Internal tooth design grips fastener and mating surface to resist vibration-induced loosening
• 3.2mm inside diameter sized for M3 metric screws
• Grade 2 spring steel construction for reliable elastic retention
• Zinc-plated finish for corrosion resistance in standard indoor applications
• 0.4mm thickness for low-profile installations with minimal stack-up

Compatibility

Designed for use with M3 metric screws and fasteners requiring a 3.2mm inside diameter internal tooth lock washer.

Installation Notes

Install this washer between the fastener head or nut and the mating surface, with the teeth facing the bearing surface to ensure proper grip. Ensure mating surfaces are clean and free of debris before assembly. De-energize and lock out any electrical equipment before servicing fasteners in live panels or enclosures. Do not reuse lock washers that have been compressed flat, as spring tension will be lost.