Century Drill Tool Co Inc 94506 5/16-24 Tap Letter I Drill Bit

Product Description

The CENTURY DRILL TOOL CO INC 94506 is a two-piece combo pack that pairs a 5/16-24 fractional tap with a letter I drill bit, giving tradespeople and knowledgeable DIYers everything needed to drill and tap 5/16-24 threads in a single purchase. The tap features precision-cut threads for consistent, exact threading on each pass. Heat treating and tempering produce file-hard threads that resist wear and extend service life. Designed for hand cutting applications, this combo is suited to maintenance, repair, and fabrication tasks where accurate threading is critical.

This combo pack is used in hand-tapping operations across a range of trades and shop environments. Common applications include threading holes in steel, aluminum, and similar metals during HVAC equipment repair, plumbing fixture installation, electrical panel work, and general mechanical fabrication. The 5/16-24 thread specification is a fine-thread standard found in many fastener and fitting applications. The letter I drill bit is correctly sized to produce the proper pilot hole for the included tap, eliminating the need to cross-reference drill charts separately.

Key Features

• 5/16-24 fractional tap with precision-cut threads for consistent, exact threading
• Heat treated and tempered for file-hard threads and extended service life
• Designed for hand cutting applications
• Letter I drill bit included and correctly sized for the 5/16-24 tap
• Two-piece combo pack simplifies tool selection for this thread specification

Compatibility

Designed as a standard hand-tapping combo for use with 5/16-24 fine-thread fastener applications in metals and similar machinable materials.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals using a standard tap wrench or T-handle. Before tapping, secure the workpiece and drill the pilot hole using the included letter I drill bit. Apply cutting fluid to the tap when threading steel or other hard metals to reduce friction and extend tap life. Follow the workpiece manufacturer guidelines and applicable safety practices when operating drills and taps.