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The L H DOTTIE CO DT1224NC is a combination drill and tap bit designed to drill and thread a 12-24 fastener hole in a single operation. This tool eliminates the need to switch between a drill bit and a separate tap, reducing steps during panel, bracket, and enclosure work. It is suited for use in sheet metal and light-gauge steel common in electrical, HVAC, and mechanical trade applications. The DT1224NC is sold individually and is a standard addition to a field technician's bit kit wherever 12-24 threaded holes are required.
This drill tap bit is used when technicians need to create tapped 12-24 threads directly in metal without pre-drilling a pilot hole separately. Typical applications include mounting components to electrical enclosures, HVAC equipment panels, strut channel work, and light structural steel fabrication. It is sized specifically for the 12-24 thread pattern, which is one of the most common machine screw sizes in trade electrical and mechanical installations.
Designed as an OEM-style replacement or standard drill tap bit compatible with 12-24 machine screw applications in light-gauge sheet metal and similar materials.
This bit is installed and used by electricians, HVAC technicians, and mechanical tradespeople working with sheet metal panels and enclosures. Use with a variable-speed drill or drill press at appropriate speeds for the base material. Ensure all power is disconnected from any enclosure or panel before drilling into live equipment. Do not use on hardened steel or materials beyond the rated capacity of the bit.
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