Value Collection MSC-04439253 Straight Flute Tap 12-24 Unc

Product Description

The VALUE COLLECTION MSC-04439253 is a straight flute bottoming tap designed to cut 12-24 UNC internal threads in through-holes and blind holes where full thread depth close to the bottom is required. Manufactured from high-speed steel with a bright uncoated finish, it features 4 flutes and an H3 thread limit for maintaining close dimensional tolerances. The overall length is 2-3/8 inches with a thread length of 15/16 inches. Right-hand thread direction and a 2B/3B class of fit make this tap suitable for standard fastener applications across a broad range of industries. Machinists and maintenance technicians use this tool in manual tapping operations as well as rigid-cycle CNC setups.

This tap is suited for threading operations in metalworking, fabrication shops, maintenance repair, and production environments where 12-24 UNC fastener threads are required. The bottoming chamfer style allows threading to within a few threads of the bottom of a blind hole, making it the correct choice when thread engagement depth is limited. It is commonly used in general machining on ferrous and non-ferrous metals when coolant-through tooling is not required.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• High-speed steel construction provides durability across a range of common workpiece materials
• 4-flute straight design suitable for through-hole and short-chip materials
• H3 thread limit for consistent tolerance control on 2B and 3B class fits
• Bright uncoated finish — no coating buildup that could affect thread tolerance
• Right-hand thread direction, 12-24 UNC standard

Compatibility

Designed as a standard replacement or stock tap for 12-24 UNC bottoming tap applications in manual or CNC tapping operations where an H3 thread limit and 2B/3B class of fit are specified.

Installation Notes

This tap is installed and driven by a tap wrench, tapping head, or rigid-cycle CNC spindle by a machinist or maintenance technician. Always use the correct tap drill size for 12-24 UNC threads before tapping, and apply appropriate cutting fluid to extend tool life and improve thread quality. Secure the workpiece firmly before beginning the tapping operation to prevent tap breakage. Reverse the tap periodically during manual tapping to break chips and clear flutes.