Value Collection MSC-04542163 Spiral Point Tap 3/8-16 Unc

Product Description

The Value Collection MSC-04542163 is a spiral point plug tap designed for threading 3/8-16 UNC through-holes in production and maintenance machining applications. Built from high speed steel (HSS) with a bright uncoated finish, this right-hand tap features 3 flutes and a plug chamfer that pushes chips forward ahead of the cut, making it well-suited for through-hole threading where chip evacuation is a priority. The H3 thread limit provides a controlled fit tolerance appropriate for Class 3B threads, delivering consistent thread quality in steel, aluminum, and similar machinable materials. Thread length measures 1.25 inches.

This tap is used in general-purpose machine shop, tool room, and maintenance environments. It is suited for CNC tapping machines, drill presses, and manual tap handles when threading through-holes in ferrous and non-ferrous metals. The plug chamfer style with 3 to 5 lead threads makes it the standard choice for most through-hole production tapping setups where a bottoming tap is not required. Licensed machinists, toolroom technicians, and maintenance mechanics routinely specify this configuration for 3/8-16 fastener applications across light manufacturing and MRO operations.

Key Features

• 3/8-16 UNC thread form with H3 thread limit for Class 3B fit tolerance
• Spiral point (gun tap) geometry pushes chips forward, ideal for through-hole tapping
• 3-flute plug chamfer provides stable cutting entry and smooth thread formation
• High speed steel construction offers good wear resistance across a range of workpiece materials
• Bright uncoated finish — compatible with most cutting fluids and tapping compounds
• Right-hand cut, standard thread direction for general fastener applications

Compatibility

Designed as a standard replacement or general-purpose spiral point plug tap for 3/8-16 UNC through-hole threading operations. Fits standard tap holders and collets sized for 3/8-inch shank taps.

Installation Notes

Installation is performed by machinists or maintenance mechanics using a tapping machine, CNC machining center, or manual tap wrench. Always ensure the workpiece is securely fixtured and the pilot hole diameter is drilled to the correct tap drill size for 3/8-16 UNC before tapping. Apply appropriate cutting fluid or tapping compound to extend tool life and improve thread finish. Do not reverse the tap under power without confirming the machine or driver supports reversing cycles to avoid tap breakage.