Kennametal 4131424 Hand Tap 3/8-16 Unc Plug Rh Tin Hss

Product Description

The KENNAMETAL 4131424 is a 3/8-16 UNC straight-flute hand tap designed for cutting right-hand internal threads in a variety of ferrous materials. Built from high-speed steel with a titanium nitride (TiN) coating, it delivers extended tool life compared to uncoated HSS tooling. The plug chamfer style provides a gradual thread lead-in, making it well suited for through-hole applications. With 3 flutes, an overall length of 2.9375 inches, and a thread length of 1.25 inches, this tap meets Class 3B fit requirements at the H3 thread limit. Machinists, toolroom technicians, and maintenance trades rely on this tap for precision threading work.

The 4131424 is used in hand-tapping and machine-tapping operations where a 3/8-16 UNC internal thread is required. It is rated for use in cast iron, stainless steel, and steel workpieces. The TiN coating reduces friction and built-up edge in these demanding materials. It fits standard tap wrenches and tapping heads sized for a 0.381-inch shank diameter. Typical applications include repair threading, fixture fabrication, and production tapping in job shops or maintenance environments.

Key Features

• High-speed steel construction provides toughness and wear resistance across ferrous materials
• Titanium nitride (TiN) coating extends tool life and reduces cutting friction
• Plug chamfer for gradual thread engagement, ideal for through-hole tapping
• 3-flute straight-flute geometry promotes chip clearance in short-chipping materials
• Class 3B fit at H3 thread limit ensures tight, precise thread tolerance
• Right-hand thread direction, 3/8-16 UNC, compatible with standard tap wrench drive

Compatibility

Rated for use in cast iron, stainless steel, and steel. Fits standard tap wrenches and machine tapping heads accepting a 0.381-inch shank diameter. Part of the KENNAMETAL Series 2303 hand tap line.

Installation Notes

This tap is installed by machinists or maintenance technicians using a calibrated tap wrench or tapping fixture. Ensure the workpiece is securely fixtured and the tap is started square to the hole before applying torque. Apply appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. Remove chips periodically by reversing the tap to prevent flute loading and tap breakage.