Value Collection SIWIS0620XUSA-050BX Lock Washer Steel

Product Description

The VALUE COLLECTION SIWIS0620XUSA-050BX is a zinc-plated, steel internal tooth lock washer sized for 5/8 inch screws. It features an inside diameter of 0.659 inches and an outside diameter of 0.883 inches, with a material grade of 1075 steel. The internal tooth design bites into the mating surface and fastener head to resist loosening under vibration and torque. This washer is installed by electricians, HVAC technicians, plumbers, and general mechanical trades wherever a secure, vibration-resistant fastener assembly is required.

This internal tooth lock washer suits standard 5/8 inch fastener applications across residential and commercial construction, mechanical equipment, electrical enclosures, and HVAC system assemblies. The zinc plating provides corrosion resistance in moderate-exposure environments. It is sold in a minimum order quantity of 50 pieces, making it appropriate for stocking in service vans or shop bins for routine fastener needs.

Key Features

• Internal tooth design grips both the fastener head and mating surface to resist rotation and loosening
• 0.659 inches inside diameter fits standard 5/8 inch screws and bolts
• 0.883 inches outside diameter for broad load distribution
• Grade 1075 steel construction for reliable tensile strength
• Zinc-plated finish for corrosion resistance in moderate environments
• Sold in multiples of 50 for efficient stocking and service use

Compatibility

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

Installation Notes

Install with the teeth facing the fastener head or the surface requiring grip, not recessed into a countersink. Power down or de-energize any equipment before servicing fastener assemblies in electrical or HVAC panels. Use appropriate hand tools or power drivers set to controlled torque to avoid flattening the washer teeth. Follow applicable NEC or equipment manufacturer guidelines when used in electrical assemblies.