Kennametal 4131952 Thread Forming Tap 8-32 Unc Plug Hss

Product Description

The KENNAMETAL 4131952 is a plug-chamfer thread forming tap designed to cut 8-32 UNC internal threads in non-ferrous metal workpieces. Unlike cutting taps, thread forming taps displace material rather than remove chips, producing stronger threads with a better surface finish. This tap is manufactured from Vanadium High Speed Steel (HSS-E) with a bright, uncoated finish. It features a right-hand thread direction, an H3 thread limit for controlled tolerance, and 3.5 to 5 chamfered threads on the plug lead. Overall length is 2.125 inches with a thread length of 0.375 inches. Machinists and tool-and-die technicians use this tap in through-hole threading operations.

This tap is suited for through-hole threading in non-ferrous metals such as aluminum, brass, and copper alloys. The plug chamfer makes it a versatile choice for both hand tapping and machine tapping operations where the tap can pass fully through the workpiece. It is commonly used in production machining, maintenance and repair, and fabrication environments where 8-32 UNC fastener threads are required. The 0.168-inch shank diameter fits standard tap holders and chucks sized for this thread range.

Key Features

• Thread forming design displaces material for stronger threads and no chip evacuation concerns
• Vanadium High Speed Steel (HSS-E) construction for wear resistance and toughness
• Plug chamfer with 3.5 to 5 chamfered threads for through-hole applications
• H3 thread limit for consistent tolerance control in production use
• Right-hand, 8-32 UNC thread specification
• Bright, uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed for through-hole threading of 8-32 UNC internal threads in non-ferrous metal workpieces. Fits standard tap holders and machine spindles accepting a 0.168-inch shank diameter with a 0.131-inch square drive.

Installation Notes

Thread forming taps require the correct tap drill size for the specific material and thread form — consult a thread forming drill chart before machining. Use an appropriate cutting or forming lubricant for the workpiece material to extend tap life and protect the finish. Secure the workpiece and align the tap perpendicular to the surface before engaging to avoid cross-threading or tap breakage. Follow all machine shop safety practices and ensure spindle speed is appropriate for the tap diameter and material.