Century Drill Tool 93202 1/4-18 Npt Tap 7/16 Inch Drill Combo

Product Description

The CENTURY DRILL TOOL CO INC 93202 is a combination pack containing a 1/4-18 National Pipe Thread (NPT) tap and a 7/16-inch drill bit, sold as a 2-piece set. The tap is precision cut and accurately formed to produce consistent, exact internal threads on pipe fittings and pipe ends. The tool is heat treated and tempered to achieve file-hard threads, which extends service life under repeated hand-cutting use. Licensed plumbers and pipefitters rely on this type of combo pack to drill pilot holes and cut matching NPT threads in a single coordinated operation without sourcing separate tooling.

This combo pack is suited for hand-cutting internal NPT threads on all types of pipe materials in residential and light commercial plumbing applications. The 1/4-18 NPT size is a standard thread specification widely used in gas, water, and compressed-air piping systems. The included 7/16-inch drill bit is sized to produce the correct pilot hole for the 1/4-18 tap, eliminating guesswork when preparing pipe fittings or threaded ports in cast iron, steel, or similar materials.

Key Features

• 1/4-18 NPT tap designed for internal threading on pipe fittings and pipe ends
• Includes matched 7/16-inch drill bit for correct pilot hole sizing
• Precision-formed threads for consistent, exact thread engagement
• Heat treated and tempered construction for file-hard threads and extended tool life
• Designed for hand-cutting applications
• Sold as a 2-piece combo pack

Compatibility

Designed for hand-cutting internal 1/4-18 NPT threads on all types of pipe and pipe fittings where a standard National Pipe Thread profile is required.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters following applicable IPC and IFGC code requirements for threaded pipe connections. Always secure the workpiece in a vise and apply cutting oil to the tap before beginning thread cutting to reduce friction and improve thread quality. Use the included drill bit to establish the pilot hole before tapping. Do not force the tap; back it off periodically to clear chips and prevent breakage.