Irwin 80217 Tap Drill Set 8-32 No. 29 Drill 2 Piece

Product Description

The IRWIN 80217 is a 2-piece tap and drill set combining a No. 8-32 spiral flute tap with a No. 29 high speed steel drill bit. The tap is manufactured from carbon steel with a bright finish and a plug chamfer, making it suitable for starting threads in through-holes and blind holes where a partially threaded lead is acceptable. The set is designed for machinists, maintenance technicians, electricians, and HVAC/plumbing professionals who frequently thread small-diameter fastener holes in sheet metal, brackets, and enclosures using 8-32 unified coarse thread fasteners.

This set is appropriate for light-duty threading tasks in residential and commercial maintenance environments. The No. 29 drill bit is the standard tap drill size for an 8-32 thread, providing approximately 75 percent thread engagement in steel and aluminum. Typical applications include tapping holes in electrical enclosures, HVAC cabinet panels, equipment brackets, and similar sheet metal or light steel stock. The spiral flute tap design helps evacuate chips during the tapping operation, which is especially useful in blind-hole applications.

Key Features

• No. 8-32 unified coarse thread tap in carbon steel with bright finish
• Plug chamfer allows use in both through-holes and blind holes
• Spiral flute tap geometry promotes chip evacuation during tapping
• No. 29 high speed steel drill bit matched to 8-32 tap drill size
• 2-piece set keeps the correct drill and tap together for job efficiency

Compatibility

Designed for use wherever No. 8-32 threaded holes are required. The No. 29 drill is the standard tap drill pairing for 8-32 unified coarse thread applications in steel, aluminum, and similar materials.

Installation Notes

A licensed machinist or qualified maintenance technician should select the appropriate cutting fluid for the workpiece material before tapping. Secure the workpiece firmly before drilling or tapping to prevent movement. Follow standard hand-tapping procedure: advance the tap one half turn, then back off one quarter turn to break chips. Do not force the tap — excessive torque on small-diameter taps causes breakage.