Century Drill Tool 97507 4.0x0.75 Tap No 30 Bit Combo 2pc

Product Description

The CENTURY DRILL TOOL CO INC 97507 is a metric plug-style tap and drill bit combo pack designed for hand cutting threaded holes in metal and other materials. The set pairs a 4.0 x 0.75 metric plug tap with a number 30 drill bit, giving technicians the correct clearance drill and tap in a single package. The tap features precision-cut, accurately formed threads for consistent, repeatable thread profiles. Both tools are heat treated and tempered to file-hard hardness, extending service life under regular hand-tapping workloads. Packaged as a 2-piece set, this combo reduces the risk of mismatched tooling on the job.

This combo pack is suited for maintenance, repair, and fabrication work where metric M4 x 0.75 threads are required. Typical applications include tapping threads in sheet metal, brackets, enclosures, and light structural components. The plug tap style makes it appropriate for through-holes and partially blind holes where a starting taper is not required. It is commonly used by HVAC technicians, electricians, plumbers, and general trade professionals who need to add or restore metric fastener threads in the field or shop.

Key Features

• 4.0 x 0.75 metric plug tap paired with a matching number 30 drill bit for correct thread clearance
• Precision-cut threads accurately formed for consistent, exact threading results
• Heat treated and tempered to file-hard hardness for extended tool life
• Plug-style tap designed for hand cutting applications in through-holes and partial blind holes
• 2-piece combo pack keeps drill and tap together to prevent mismatched tooling

Compatibility

Designed for hand-tapping M4 x 0.75 metric threaded holes in typical trade and fabrication applications where a plug-style tap is appropriate.

Installation Notes

This tap set is intended for hand cutting use with a standard tap handle or T-handle wrench. Always drill the clearance hole with the included number 30 bit before tapping. Secure the workpiece firmly and apply appropriate cutting fluid to extend tap life and improve thread quality. Never force the tap against hard resistance; back off periodically to break chips and prevent breakage.