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The VALUE COLLECTION 31364 is a countersunk external tooth lock washer designed for use with 1/4 inch screws. Manufactured from Grade 2 steel with a zinc-plated finish, this washer provides corrosion resistance and reliable locking performance under vibration. The countersunk external tooth design bites into the mating surface and fastener head to resist loosening. Inside diameter ranges from 0.256 to 0.267 inches, and outside diameter ranges from 0.458 to 0.478 inches. Material thickness is 0.022 inches. This item is sold in a package of 100 washers, suited for production or service environments where a ready supply is needed.
Countersunk external tooth lock washers are used in electrical, mechanical, and structural assemblies where fastener vibration or rotation loosening is a concern. They are commonly installed by electricians, HVAC technicians, plumbers, and general mechanical trades in panel assemblies, equipment housings, junction boxes, and mounting hardware. The zinc plating makes these suitable for light indoor and moderate-exposure applications. Each package contains 100 washers, making them practical for bench stock or field service kits.
Designed for use with 1/4 inch screws as an OEM-style or general replacement lock washer in mechanical, electrical, and HVAC equipment assemblies requiring a countersunk external tooth configuration.
Install with the toothed face contacting the workpiece or mating surface, not the fastener head, to ensure proper locking engagement. Ensure the mating surface is clean and free of coatings that may prevent tooth bite. These washers are intended for single-use installation; do not reuse after removal as tooth deformation reduces locking effectiveness. Follow applicable torque guidelines specified by the equipment manufacturer or relevant code authority for the fastener size and material combination.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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