Value Collection SEW7X0200-200BX M2 Lock Washer 200 Pack

Product Description

The VALUE COLLECTION SEW7X0200-200BX is an M2 external tooth lock washer engineered to resist fastener loosening under vibration and dynamic loading. Stamped from Grade 18-8 austenitic stainless steel to the A2 material classification, it delivers solid corrosion resistance without a coating. The washer seats between the fastener head and the mating surface, where its serrated outer teeth bite into both surfaces to maintain clamp load. With a 2.2mm inside diameter, 4.5mm outside diameter, and 0.3mm thickness, it is sized specifically for M2 screw applications. Licensed trades and assembly technicians working in corrosive or high-humidity environments commonly specify this grade for its combination of strength and oxidation resistance.

This washer is used in light fastening applications where an M2 screw is the primary fastener. Typical installation environments include small-frame electrical enclosures, electronic assemblies, instrumentation panels, and precision mechanical components. The external tooth profile provides greater locking surface area than internal tooth designs, making it well suited for thin sheet metal and close-tolerance assemblies. The uncoated stainless finish is appropriate where surface conductivity or chemical compatibility with coatings is a concern. This item is sold as a minimum order quantity of 200 pieces per package, suitable for shop stock or recurring maintenance inventory.

Key Features

• External tooth profile bites into fastener and mating surface to resist loosening under vibration
• Grade 18-8 austenitic stainless steel, A2 classification, for corrosion resistance without coating
• 2.2mm inside diameter sized for M2 screw fasteners
• 0.3mm thickness maintains a low profile in tight-clearance assemblies
• Uncoated finish retains surface conductivity and avoids coating compatibility issues
• Packaged in a 200-piece minimum order quantity for bench stock and production use

Compatibility

Designed as a standard external tooth lock washer for use with M2 screws across light mechanical and electrical assembly applications.

Installation Notes

Installation is typically performed by assembly technicians, electricians, or mechanical service personnel using standard hand tools or torque drivers. Place the washer on the fastener shank with the teeth facing the mating surface before seating the fastener head. De-energize any electrical assembly and follow applicable NEC guidelines before installing hardware in live panels. Do not reuse lock washers that have been fully compressed, as the tooth engagement and spring action will be diminished.