Value Collection SIWIS0430USA-100BX Lock Washer 100 Pack

Product Description

The VALUE COLLECTION SIWIS0430USA-100BX is a zinc-plated, Grade 2 steel internal tooth lock washer sized for 7/16 inch screws with an inside diameter of 0.464 inches and an outside diameter of 0.789 inches. The internal tooth design bites into the mating surface and fastener head to resist loosening under vibration and torque. At 0.04 inches thick, this washer is suited for general-purpose mechanical and structural fastening applications. Sold in a box of 100 pieces, this washer is a standard consumable for electricians, HVAC technicians, plumbers, and maintenance professionals who need reliable anti-rotation hardware at volume.

Internal tooth lock washers in this size range are commonly used in panel assembly, equipment mounting, electrical enclosures, and HVAC component installation where fastener retention under vibration is required. The zinc finish provides corrosion resistance in typical indoor and light-duty service environments. This box quantity of 100 is appropriate for shop stock, service van inventory, or project-specific bulk use across residential and light commercial applications.

Key Features

• Internal tooth design grips mating surfaces to prevent fastener back-out under vibration
• 0.464 inches inside diameter fits standard 7/16 inch fasteners
• 0.789 inches outside diameter provides broad bearing surface
• 0.04 inches thickness for low-profile installation in tight assemblies
• Zinc-plated finish for corrosion resistance in standard service conditions
• Grade 2 steel construction meets general-purpose fastening requirements

Compatibility

Designed for use with 7/16 inch screws and bolts in general mechanical, electrical, and HVAC fastening applications requiring an internal tooth lock washer.

Installation Notes

Installation is performed by any trade professional working with 7/16 inch fasteners. Place the washer between the fastener head and the mating surface with the teeth facing the fastener head or the work surface as required by the application. Ensure the mating surface is clean and free of debris before seating the washer. Follow applicable code requirements such as NEC for electrical panel assemblies when selecting hardware for those environments.