Description

The CENTURY DRILL TOOL CO INC 95407 is a two-piece combo pack pairing a 3/8-16 national coarse fractional tap with a 5/16 inch drill bit. The tap features precision-cut threads that are accurately formed for consistent, exact threading in ferrous and non-ferrous materials. Both tools are heat treated and tempered to file-hard hardness, which extends working life and maintains thread accuracy under repeated use. This combo is designed specifically for hand cutting applications and is well suited for maintenance technicians, plumbers, electricians, and HVAC service techs who need to tap threads in the field or at the bench.

This pack is intended for hand tapping 3/8-16 national coarse threads in a range of materials common to trade work, including steel brackets, electrical enclosures, pipe hangers, and equipment mounting hardware. The included 5/16 inch drill bit is the correct tap drill size for a 3/8-16 thread, eliminating the need to source the bit separately. The combo format makes it a practical addition to a service van or toolbox where space and efficiency matter.

Key Features

3/8-16 national coarse thread specification for widely used fastener applications
Includes matched 5/16 inch tap drill bit correct size for 3/8-16 threads
Heat treated and tempered to file-hard hardness for extended tool life
Precision-formed threads for consistent, accurate threading results
Designed for hand cutting applications no machine tapping required
Two-piece combo pack reduces the need to source tap and bit separately

Compatibility

Designed as an OEM-style hand tap and drill bit combo for general trade use where 3/8-16 national coarse threads are required in metal or similar materials.

Installation Notes

This tap set is intended for hand cutting use only do not use in a power drill or tapping machine unless the tool is explicitly rated for it. Always drill the pilot hole with the included 5/16 inch bit before tapping to ensure proper thread engagement and to prevent tap breakage. Apply cutting fluid or thread-cutting oil when tapping steel to reduce friction and extend tool life. Follow applicable shop safety practices and wear eye protection when drilling and tapping.