Value Collection 31350 Internal Tooth Lock Washer 100-pack

Product Description

The VALUE COLLECTION 31350 is a 6 screw internal tooth lock washer made from Grade 2 steel with a zinc-plated finish. Internal tooth lock washers grip the mating surface through serrated inner teeth that bite into the fastener head and the workpiece when torque is applied, resisting loosening from vibration and thermal cycling. At 0.017 inches thick with an inside diameter ranging from 0.142 to 0.150 inches and an outside diameter ranging from 0.278 to 0.288 inches, this washer is sized for use with 6 screw fasteners. Electricians, HVAC technicians, and general tradespeople use these washers in panel assemblies, equipment mounting, and control box applications.

This washer is well suited for light-duty mechanical and electrical assembly work in residential and commercial applications. The zinc plating provides a basic level of corrosion resistance appropriate for indoor or protected installations. Sold in a 100-piece package, this fastener hardware is a practical addition to any service van or shop stock for recurring assembly tasks.

Key Features

• Internal tooth design bites into fastener and substrate to resist loosening under vibration
• Grade 2 steel construction for light-duty mechanical and electrical assemblies
• Zinc-plated finish for basic corrosion protection in indoor or protected environments
• Sized for 6 screw fasteners with inside diameter of 0.142 to 0.150 inches
• 0.017-inch thickness provides consistent clamping without excessive stack height
• 100-piece package supports bulk stocking for high-frequency service work

Compatibility

Designed as an OEM-style replacement and general-use internal tooth lock washer for 6 screw fastener applications in mechanical and electrical assemblies.

Installation Notes

Installation is performed by electricians, HVAC technicians, plumbers, and general mechanical tradespeople during panel, equipment, or fixture assembly. Always de-energize equipment and follow applicable NEC or local electrical codes before working inside control enclosures or panels. Place the washer between the fastener head and the workpiece surface so the teeth contact both surfaces when the fastener is tightened. Do not reuse lock washers that have been fully compressed or deformed, as the locking effectiveness is reduced.