Value Collection SIWIS0620USA-100BX Lock Washer 100 Pack

Product Description

The VALUE COLLECTION SIWIS0620USA-100BX is a zinc-plated, steel internal tooth lock washer designed for use with 5/8-inch screws. It features an inside diameter of 0.663 inches and an outside diameter of 1.071 inches, with a thickness of 0.05 inches. The internal tooth design bites into mating surfaces under load to resist loosening from vibration and torque. Made from Grade 2 steel with a zinc finish for basic corrosion resistance, this washer is a standard hardware component used across HVAC, plumbing, electrical, and general mechanical assembly work. Sold in a box quantity of 100 pieces.

This internal tooth lock washer is suited for a wide range of fastening applications in residential and commercial settings. It is commonly used when assembling equipment panels, mounting brackets, junction boxes, conduit fittings, and mechanical components where fastener retention under vibration is required. The zinc plating provides moderate corrosion protection appropriate for indoor and sheltered installations. Technicians across HVAC, electrical, and plumbing trades use this type of washer as a standard component in both new installations and service work.

Key Features

• Internal tooth design resists loosening under vibration and torque
• Fits 5/8-inch screw with 0.663-inch inside diameter
• Outside diameter of 1.071 inches for broad bearing surface
• Grade 2 steel construction for general-purpose strength
• Zinc-plated finish for basic corrosion resistance
• Sold in a box of 100 washers for stocking and bulk service use

Compatibility

Designed as a standard internal tooth lock washer for use with 5/8-inch fasteners in general mechanical, electrical, and HVAC assembly applications.

Installation Notes

Install with the teeth facing the fastener head or the mating surface to ensure proper locking action. Power down or de-energize any electrical equipment before servicing fasteners on live assemblies. Use appropriate hand tools to achieve adequate clamping force without deforming the washer. Follow applicable NEC or local mechanical codes when used in electrical or HVAC panel assemblies.