Value Collection R63082243 Internal Tooth Lock Washer

Product Description

The VALUE COLLECTION R63082243 is a stainless steel internal tooth lock washer designed for use with 5/16 inch screws. It provides reliable vibration resistance and anti-loosening performance through its serrated internal teeth, which bite into the bearing surface and fastener head to maintain clamp load. Manufactured from Grade 410 stainless steel, this washer offers good mechanical strength and moderate corrosion resistance in service environments where fastener security is critical. The inside diameter measures 0.332 inches and the outside diameter measures 0.61 inches, with a thickness of 0.034 inches. It is a standard component stocked and used by HVAC, plumbing, electrical, and general mechanical tradespeople in assemblies requiring secure fastening.

This internal tooth lock washer is suited for use in light to medium-duty mechanical assemblies, panel mounting, equipment enclosures, and structural fastening applications where vibration or torque could cause fastener loosening over time. The internal tooth design is appropriate where the washer must stay within the fastener head footprint, leaving surrounding material undamaged. It is commonly used in both residential and commercial trade installations wherever a 5/16 inch fastener requires added locking action.

Key Features

• Internal tooth geometry keeps washer within fastener head boundary and bites mating surfaces for locking action
• Grade 410 stainless steel construction provides mechanical strength and moderate corrosion resistance
• Inside diameter of 0.332 inches fits standard 5/16 inch screw shank
• Outside diameter of 0.61 inches with a 0.034 inch thickness for compact, low-profile seating
• Does not meet military specifications — appropriate for commercial and trade applications
• Sold individually; minimum order quantity of 100 units

Compatibility

Designed as a standard internal tooth lock washer for use with 5/16 inch screws in mechanical, HVAC, electrical, and plumbing assemblies requiring anti-loosening fastener hardware.

Installation Notes

Install between the fastener head or nut and the mating surface, ensuring the teeth face the bearing surface to engage properly under torque. Power down or de-energize any electrical or mechanical system before servicing fastened assemblies. Use appropriate hand tools or a calibrated torque wrench to achieve the fastener specification required by the equipment manufacturer or applicable code. Do not reuse a lock washer that has been fully compressed, as the locking teeth will no longer function effectively.