Hertel K010354AS25 Thread Forming Tap 10-32 Unf Plug Hss Tin

Product Description

The HERTEL K010354AS25 is a thread forming tap designed for 10-32 UNF right-hand internal threads in through-hole applications. Unlike cutting taps, this plug-chamfer forming tap displaces material rather than cutting it, producing stronger, smoother threads with no chips to evacuate. It is manufactured from high-speed steel and coated with titanium nitride to extend tool life and reduce friction during forming. With an overall length of 2.375 inches and a thread length of 0.875 inches, this tap suits standard production and maintenance threading operations. Machinists, tool-and-die makers, and maintenance mechanics working in metal fabrication, HVAC equipment assembly, and electrical panel manufacturing are the primary users.

This tap is suited for through-hole threading in ductile metals such as aluminum, mild steel, and copper alloys where chipless thread forming is preferred over cutting. The plug chamfer with 3 to 5 chamfered threads makes it appropriate for through-holes where the tap can be driven fully through the workpiece. It fits standard tap holders and drive equipment compatible with a 0.194-inch shank diameter and a 0.152-inch square drive size.

Key Features

• Thread forming design displaces material rather than cutting, producing stronger threads with no chip generation
• Titanium nitride coating reduces friction and extends tool life compared to uncoated high-speed steel
• Plug chamfer (3 to 5 chamfered threads) optimized for through-hole threading operations
• H4 thread limit for consistent fit within UNF tolerance class specifications
• Right-hand thread direction compatible with standard tap drives and CNC tapping attachments
• 0.194-inch shank diameter with 0.152-inch square drive for use in standard tap holders

Compatibility

Designed as an OEM-style replacement or direct substitute for 10-32 UNF plug-chamfer thread forming taps used in standard tap holders accepting a 0.194-inch round shank with 0.152-inch square drive.

Installation Notes

This tap should be installed by a qualified machinist or maintenance mechanic using a properly sized tap wrench, tapping head, or CNC tapping attachment. Ensure the workpiece is securely fixtured and the through-hole is drilled to the correct tap drill diameter for thread forming before beginning the operation. Apply appropriate tapping fluid or cutting oil to reduce heat and friction during the forming process. Do not reverse the tap under load without confirming the drive equipment supports reversible tapping to avoid tool breakage.