Value Collection KP86815 Lock Washer 4 Screw 0.123 in Id 100pk

Product Description

The VALUE COLLECTION KP86815 is a 4 screw internal tooth lock washer designed to prevent fastener loosening under vibration and dynamic loads. Stamped from Grade 410 stainless steel, each washer features internal serrated teeth that bite into the mating surface and fastener bearing face as the joint is torqued, maintaining clamping force over time. The 0.123 inch inside diameter suits number 4 machine screws. Overall outside diameter measures 0.27 inches and thickness is 0.019 inches. These washers are well suited for electrical enclosures, HVAC equipment panels, plumbing fixtures, and any assembly requiring corrosion-resistant fastener retention.

These internal tooth lock washers are used in light fastening applications across residential and commercial trade work. Typical installations include terminal connections in electrical panels, equipment chassis, control board mounting, and sheet-metal assemblies where a standard flat washer alone is insufficient. Each pack contains 100 washers, making it practical for service vehicles and shop stock. Grade 410 stainless steel provides moderate corrosion resistance suitable for indoor and protected outdoor environments.

Key Features

• Internal serrated teeth grip both fastener and mating surface to resist loosening from vibration
• Grade 410 stainless steel construction for corrosion resistance in trade applications
• 0.123 inch inside diameter sized for number 4 screws
• 0.27 inch outside diameter and 0.019 inch thickness for compact fastening clearance
• Pack of 100 washers for efficient shop and field stocking

Compatibility

Designed as an OEM-style replacement or standard-stock internal tooth lock washer for number 4 screw fastening applications in HVAC, electrical, plumbing, and general equipment assembly.

Installation Notes

Internal tooth lock washers are installed by electricians, HVAC technicians, plumbers, and general mechanical trades as part of fastened joint assembly. Place the washer between the fastener head and the mating surface with the teeth facing the surface to be gripped. De-energize and lock out any electrical or mechanical equipment before servicing fastened assemblies per applicable NFPA 70 or local electrical code requirements. Do not reuse lock washers that have been fully compressed or deformed, as tooth engagement may be compromised.