Value Collection MSC-04460218 Straight Flute Tap 1/4-20

Product Description

The VALUE COLLECTION MSC-04460218 is a straight flute bottoming tap designed for cutting internal threads in pre-drilled holes where full thread depth close to the bottom of a blind hole is required. Made from high-speed steel with a bright, uncoated finish, this tap cuts 1/4-20 UNC right-hand threads and features 4 flutes for efficient chip clearance during hand or machine tapping operations. With a 1-inch thread length and 2.5-inch overall length, it suits light to medium threading tasks in steel, aluminum, cast iron, and similar materials.

This bottoming tap is used in machining, fabrication, and maintenance applications where a preceding taper or plug tap has already started the thread and full thread engagement at the base of a blind hole is needed. Typical users include machinists, tool-and-die workers, maintenance technicians, and general fabricators working in job shop or production environments. The 1/4-20 UNC thread form is one of the most common unified coarse thread sizes in North American industry.

Key Features

• Bottoming chamfer allows threading to the bottom of blind holes
• 4 straight flutes provide consistent chip evacuation in through and blind hole applications
• High-speed steel construction offers good wear resistance for general-purpose threading
• Bright/uncoated finish suitable for use with cutting fluid in a range of workpiece materials
• H2 thread limit for standard tolerance threading on 1/4-20 UNC threads
• Right-hand thread direction matches standard fastener orientation

Compatibility

Designed as an OEM-style replacement or standard tooling option for 1/4-20 UNC bottoming tap applications in hand tapping, drill press, or CNC tapping operations requiring H2 thread limit tolerance.

Installation Notes

A licensed machinist or trained technician should select the correct tap drill size for a 1/4-20 UNC thread before use. Always apply an appropriate cutting fluid or tapping compound to extend tool life and reduce risk of tap breakage. When tapping blind holes, use a taper or plug tap first to start the thread before switching to this bottoming tap. Back the tap out periodically to break chips and prevent binding.