Value Collection MSC-04504411 Spiral Point Tap 4-40 Unc

Product Description

The VALUE COLLECTION MSC-04504411 is a spiral point tap designed for cutting 4-40 UNC internal threads in through-hole and blind-hole applications where a bottoming chamfer is required. Built from high speed steel (HSS) with a bright, uncoated finish, this tap features 2 flutes and an H2 thread limit for consistent tolerance control. The spiral point geometry pushes chips forward ahead of the tap, making it well suited for threading in softer metals, plastics, and other machinable materials. It is a right-hand tap with a 9/16-inch thread length and a 2B/3B class of fit, meeting standard commercial and precision threading requirements.

This tap is used in machine shops, maintenance and repair operations, and production environments where fine 4-40 UNC threads are required. The bottoming chamfer allows the tap to cut threads close to the bottom of a blind hole, which is critical when thread engagement depth is limited. It is appropriate for use in drill presses, CNC machining centers, and tapping machines, as well as hand-tapping operations where fine thread control is needed. Machinists, tool and die makers, and maintenance technicians are the typical users.

Key Features

• 4-40 UNC thread form with bottoming chamfer for threading close to hole bottom
• 2-flute spiral point design pushes chips forward, reducing clogging in through-hole applications
• H2 thread limit ensures consistent fit within 2B/3B class of fit tolerances
• High speed steel construction provides durability across a range of machinable materials
• Bright, uncoated finish suitable for general-purpose threading without coolant-through requirement
• Right-hand thread direction, 9/16-inch thread length

Compatibility

Designed as a standard replacement or general-purpose spiral point tap for any application requiring 4-40 UNC internal threads with a bottoming chamfer and H2 thread limit.

Installation Notes

Install in a compatible tap holder, chuck, or tapping head rated for the shank size of this tap before use. Always ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for 4-40 UNC threads prior to tapping. Apply an appropriate cutting fluid or tapping compound to extend tool life and improve thread finish. Follow standard shop safety practices and reverse the tap periodically to break chips when hand tapping.