Value Collection MSC-04489472 Straight Flute Tap 1-1/4-12

Product Description

The VALUE COLLECTION MSC-04489472 is a straight flute tap designed for cutting 1-1/4-12 UNF internal threads in a range of workpiece materials. With six flutes and a taper chamfer, this tap starts easily in a drilled hole and evacuates chips efficiently during threading operations. Constructed from high-speed steel with a bright, uncoated finish, it delivers reliable cutting performance in production and job-shop environments. The H4 thread limit designation indicates a controlled oversize tolerance suitable for achieving a 3B class of fit. At 5.75 inches overall length and 2.5625 inches of thread length, it accommodates standard toolholding setups on manual machines and CNC tapping cycles alike. Machinists and tool-and-die tradespeople are the primary installers.

This tap is suited for threading operations requiring a fine-pitch 1-1/4-12 UNF thread, commonly encountered in hydraulic fittings, structural fastener applications, and precision mechanical assemblies. The taper chamfer style makes it appropriate for through-hole and blind-hole applications where starting alignment and controlled engagement are priorities. Right-hand thread direction matches standard tapping rotation on conventional drill presses, lathes, and tapping machines. The bright finish is compatible with cutting oils and water-soluble coolants applied externally; the tap does not support coolant-through delivery.

Key Features

• 1-1/4-12 UNF thread size with right-hand thread direction for standard tapping setups
• Six flutes provide efficient chip clearance and smooth thread formation
• Taper chamfer eases entry and alignment in drilled holes
• H4 thread limit achieves 3B class of fit for precision thread tolerances
• High-speed steel construction maintains cutting edge integrity across common engineering materials
• Bright, uncoated finish compatible with external cutting fluid application

Compatibility

Designed for use in any standard tapping application requiring a 1-1/4-12 UNF internal thread with a 3B class of fit and H4 thread limit.

Installation Notes

Installation is performed by machinists using a tap wrench, tapping head, or CNC rigid-tapping cycle. Ensure the workpiece is securely fixtured and the pilot hole diameter matches the recommended tap drill size for 1-1/4-12 UNF before starting. Apply an appropriate cutting fluid for the workpiece material throughout the operation to prevent galling and extend tap life. Back off the tap periodically to break and clear chips, particularly in deeper blind holes.