Chicago-latrobe 55305 Tap Drill Set 36 Piece Hss

Product Description

The CHICAGO-LATROBE 55305 is a 36-piece tap and drill set covering thread sizes from 6-32 up to 1/2-20 and drill sizes from 5/16 inches to 29/64 inches. Both the taps and drills are manufactured from high speed steel with a bright finish, offering solid performance across a wide range of threading applications. The taps feature a plug chamfer, which is the standard choice for through-hole and most general-purpose hand tapping work. The set is packaged in a metal case and includes a tap and drill chart for quick reference on the job or at the bench.

This set is suited for machinists, maintenance technicians, and trade professionals who regularly need to cut internal threads across a variety of fastener sizes. The coverage from 6-32 to 1/2-20 handles the most common inch-series thread sizes encountered in mechanical assembly, equipment repair, and field service work. The 36-piece configuration includes 18 taps and 17 drills spanning wire, letter, and fractional sizes, giving a technician the correct drill for each tap without having to source individual pieces.

Key Features

• 36-piece set includes 18 high speed steel taps and 17 high speed steel drills
• Tap thread range: 6-32 minimum to 1/2-20 maximum (standard hand tap type)
• Drill size range: 5/16 inches fractional minimum to 29/64 inches fractional maximum; wire sizes No. 36 to No. 3; letter sizes F to U
• Plug chamfer on all taps for versatile through-hole and general-purpose threading
• Bright finish on taps — no coating that could affect dimensional tolerances on close-tolerance threads
• Stored in a metal case with a tap and drill chart included

Compatibility

Designed for standard inch-series hand tapping applications requiring coverage from 6-32 to 1/2-20 thread sizes, compatible with conventional tap handles and hand-tapping setups used in maintenance, fabrication, and mechanical repair work.

Installation Notes

Always secure the workpiece before tapping and use a proper tap handle sized for the tap being driven. Cut threads in appropriate materials using cutting oil or tapping fluid to extend tool life and improve thread quality. Back the tap off periodically to break chips when tapping blind holes. Follow applicable shop safety practices when drilling pilot holes prior to tapping.