Hertel K010354AS Thread Forming Tap 10-32 Unf Plug Hss

Product Description

The HERTEL K010354AS is a thread forming tap designed for creating 10-32 UNF internal threads in ductile materials without cutting. Unlike cutting taps, thread forming taps cold-form the thread profile by displacing material, producing stronger threads with no chips to clear. This tap features a plug chamfer with 3 to 5 chamfered threads for gradual thread engagement, an H4 thread limit for consistent fit tolerance, and a bright uncoated high-speed steel construction suited to a wide range of general-purpose tapping applications. Machinists, maintenance technicians, and fabricators use this tap in hand tapping or machine tapping setups.

This tap is suited for through-hole threading operations in soft to medium-hardness metals including aluminum, brass, and low-carbon steel. The 10-32 UNF thread size is common in instrumentation, electronics enclosures, small fastener assemblies, and light mechanical fabrication. Its plug chamfer makes it appropriate as a starting tap in through-holes or as a follow-up in blind holes where the chamfer length is not a limitation.

Key Features

• Thread forming design cold-forms threads, eliminating chip production and reducing tap breakage risk
• 10-32 UNF thread size with right-hand thread direction
• Plug chamfer with 3 to 5 chamfered threads for controlled thread engagement
• H4 thread limit for consistent tolerance control on formed threads
• High-speed steel construction provides durability across general-purpose tapping
• Bright uncoated finish suitable for use with standard tapping fluids

Compatibility

Designed for through-hole threading in applications requiring 10-32 UNF internal threads. Compatible with standard tap holders and machine tapping chucks accepting a 0.194-inch shank diameter with a 0.152-inch square drive.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which is larger than the equivalent cutting tap drill size - consult a thread forming drill chart for the correct hole diameter before tapping. Secure the workpiece and use a recommended tapping fluid or cutting oil appropriate for the base material. For machine tapping, set spindle speed per material recommendations and use a floating tap holder to compensate for feed variation. Inspect the tap for wear or galling regularly, as thread forming taps are sensitive to inadequate lubrication.