Value Collection MSC-04489654 Straight Flute Tap

Product Description

The VALUE COLLECTION MSC-04489654 is a straight flute tap designed for cutting internal threads in through-holes and shallow blind holes. Built from high-speed steel with a bright, uncoated finish, it cuts 1-1/2-12 UNF right-hand threads to a 3B class of fit with an H4 thread limit. Six flutes provide a balance of chip clearance and cutting edge support, making this tap well suited for threading ferrous and non-ferrous materials in production and maintenance environments. Overall length is 6-3/8 inches with a 3-inch thread length. Machinists and tool-and-die tradespeople are the primary users of this tool.

This tap is used in machine shop, manufacturing, and industrial maintenance settings where UNF fine-thread holes are required at the 1-1/2-inch diameter. The plug chamfer — typically 3 to 5 threads of lead — makes it appropriate for starting threads in through-holes or continuing threads after a taper tap. It is compatible with standard tap handles, manual tapping machines, and CNC rigid-tapping operations at appropriate speeds and feeds for the workpiece material.

Key Features

• 1-1/2-12 UNF thread form for fine-pitch internal threading
• 6-flute geometry balances chip evacuation with cutting edge rigidity
• Plug chamfer provides 3-5 thread lead for general-purpose through-hole tapping
• High-speed steel construction maintains edge integrity across a wide range of materials
• Bright, uncoated finish allows for easy visual wear inspection during service
• H4 thread limit and 3B class of fit meet standard tolerance requirements for most industrial applications

Compatibility

Designed as a general-purpose straight flute tap for 1-1/2-12 UNF internal threading applications. Compatible with standard tap wrenches, manual tapping arms, and rigid CNC tapping setups configured for this thread size.

Installation Notes

Always secure the workpiece firmly before tapping and use appropriate cutting fluid to reduce heat and extend tool life. Apply consistent, even pressure and back off periodically to break chips, especially in blind-hole applications. Inspect the tap for wear or chipping before each use; a damaged tap can seize or break in the hole. Follow shop safety procedures and use eye protection when operating tapping equipment.