Value Collection -22442-12 Hand Sti Tap M12 X 1.75

Product Description

The VALUE COLLECTION -22442-12 is a hand STI tap designed for cutting Spark Taps International (STI) threads into pre-drilled holes, producing oversized threads intended to accept helical thread inserts. Ground to an M12 x 1.75 metric coarse thread profile with a D3 thread limit, this tap delivers accurate, consistent threading in steel, cast iron, aluminum, and similar materials. The 4-flute plug chamfer geometry provides a gradual lead-in that is well-suited to through-holes and moderate-depth blind holes. Constructed from high speed steel with a bright finish, it is built for durability under hand-tapping conditions in general machining and repair work.

This tap is used in maintenance, repair, and manufacturing environments where metric thread inserts are required to restore or reinforce tapped holes. It is appropriate for hand tapping operations in machine shops, production facilities, and field repair settings. The plug chamfer style makes it a practical general-purpose choice where a starting tap is not required. The 3-19/32 inch overall length provides sufficient handle clearance for use with a standard tap wrench.

Key Features

• M12 x 1.75 metric coarse thread size for STI insert applications
• D3 thread limit for controlled fit and dimensional accuracy
• 4-flute design supports balanced cutting and chip clearance
• Plug chamfer allows gradual thread engagement in through-holes and shallow blind holes
• High speed steel construction resists wear during hand-tapping operations
• Bright finish provides a baseline surface condition suitable for use with cutting fluids

Compatibility

Designed as an OEM-style replacement or standard hand tap for use in STI thread insert applications requiring an M12 x 1.75 metric coarse thread profile.

Installation Notes

Installation should be performed by a machinist or qualified technician using a properly sized tap wrench. Secure the workpiece before tapping and apply cutting fluid appropriate to the base material to reduce heat and extend tap life. Back off the tap periodically to break chips and clear flutes, especially in deeper holes. Inspect the tapped threads with a thread gauge or insert before final assembly to confirm fit.