Value Collection MSC-04484143 Straight Flute Tap 1/2-13

Product Description

The VALUE COLLECTION MSC-04484143 is a straight flute bottoming tap designed to cut 1/2-13 UNC right-hand threads in pre-drilled holes. Built from high-speed steel with a bright, uncoated finish, this tap is engineered for threading operations that require cutting close to the bottom of a blind hole. It features 4 flutes and meets a 2B class of fit with an H5 thread limit, making it suitable for standard tolerance threading work in ferrous and non-ferrous materials. Overall length is 3.375 inches, with a thread length of 1.656 inches. Machinists and tool-and-die professionals reach for bottoming taps as the final step in a three-tap sequence or whenever full thread depth near the hole bottom is required.

This tap is used in machine shops, maintenance and repair operations, and production environments where 1/2-13 UNC threads are common. It is appropriate for threading operations in steel, aluminum, cast iron, and similar workpiece materials when used with proper cutting fluid. The bottoming chamfer design allows the tap to engage threads within 1 to 2 pitches of the hole bottom, making it the correct choice for shallow blind holes where a taper or plug tap cannot complete the thread depth.

Key Features

• 1/2-13 UNC thread form with right-hand direction
• Bottoming chamfer for threading to the bottom of blind holes
• 4 straight flutes for chip clearance and rigidity
• H5 thread limit and 2B class of fit for standard tolerance applications
• High-speed steel construction for durability across common workpiece materials
• Bright, uncoated finish — suitable for use with cutting oil or coolant

Compatibility

Designed as a standard bottoming tap for 1/2-13 UNC threaded holes in general machining and repair applications.

Installation Notes

This tap is installed using a tap wrench, tapping head, or machine spindle rated for the appropriate torque range for the workpiece material. Always use a suitable cutting fluid to extend tool life and improve thread finish. Ensure the tap is aligned perpendicular to the workpiece surface before engagement to avoid thread distortion or tap breakage. In a blind-hole sequence, use a taper tap followed by a plug tap before finishing with this bottoming tap.