Hilmor 1839066 Magnetic Nut Driver 3 Inch Shaft

Product Description

The HILMOR 1839066 is a dual-size magnetic nut driver designed for HVAC and refrigeration technicians who work with sheet metal screws, equipment panels, and fastened enclosures. The 3-inch shaft is hollow, allowing it to seat fully over long bolts without bottoming out. A magnetic tip holds fasteners in place during placement and removal, reducing dropped hardware in tight spaces. The driver ships as a two-piece set covering the two most common HVAC fastener sizes: 1/4 inch and 5/16 inch. Chrome-vanadium steel construction provides durability under repeated daily use in the field.

This nut driver set is suited for residential and light commercial HVAC service work, including panel removal, blower compartment access, and equipment installation. The color-coded inserts — red and yellow — allow quick size identification when both drivers are on a belt or in a bag. Wrench flats on the body let technicians apply additional torque with an open-end wrench when hand torque is insufficient. The slip-resistant grip supports controlled driving in awkward positions or overhead installs.

Key Features

• Magnetic tip securely holds fasteners during placement and removal
• Hollow 3-inch shaft accommodates long bolts without obstruction
• Color-coded inserts for fast size identification: red and yellow
• Wrench flats on body allow extra torque with an open-end wrench
• Slip-resistant grip for controlled driving in awkward positions
• Chrome-vanadium steel construction for field durability

Compatibility

Designed for use with standard 1/4-inch and 5/16-inch hex-head fasteners commonly found in HVAC equipment panels, ductwork, and electrical enclosures.

Installation Notes

HVAC technicians install and service this tool without electrical lockout requirements, but standard service precautions apply when working near energized equipment. Use the wrench flats with an appropriately sized open-end wrench only when additional torque is needed to avoid fastener damage. Inspect the magnetic tip periodically to ensure it retains adequate holding strength, particularly after prolonged exposure to metal shavings or debris.

Technical Specifications

• Shaft Length: 3 inches
• Drive Sizes Included: 1/4 inch, 5/16 inch
• Shaft Type: Hollow
• Tip Type: Magnetic
• Material: Chrome-vanadium steel
• Colors: Red and Yellow
• Unit of Measure: Each (set of 2)

Standard Information

• Brand: HILMOR
• Manufacturer Part Number: 1839066