Hertel K008926AS Tap Set 3/8-24 Unf 4 Flute Hss Bright

Product Description

The HERTEL K008926AS is a 3-piece tap set ground to 3/8-24 UNF thread form for cutting internal threads in steel, aluminum, cast iron, and similar materials. Each tap is machined from high speed steel (HSS) with a bright finish and ground to four flutes for efficient chip evacuation and accurate thread profile. The overall length of each tap measures 2-15/16 inches. The set covers a Class of Fit of 2B and 3B, making it suitable for standard and close-tolerance threaded assemblies. Licensed machinists, maintenance mechanics, and tool and die tradespeople reach for sets like this for production tapping and field repair work alike.

This tap set is suited for tapping 3/8-24 UNF holes in ferrous and non-ferrous metals in both shop and field environments. The 3/8-24 UNF thread is a fine-pitch unified thread commonly found in automotive, hydraulic, and precision mechanical assemblies. The 3-piece configuration typically includes a taper, plug, and bottoming tap to handle through-holes and blind holes across a range of thread depth requirements. The H3 thread limit keeps tolerances tight and predictable across all three taps in the set.

Key Features

• 3/8-24 UNF thread form for fine-pitch unified internal threading
• High speed steel construction for durability across a broad range of workpiece materials
• 4-flute geometry supports chip evacuation and clean thread cutting
• H3 thread limit for consistent, close-tolerance results
• Class of Fit 2B and 3B covers standard and precision threaded assembly requirements
• 2-15/16 inch overall length accommodates standard tap holders and T-handle wrenches

Compatibility

Designed as an OEM-style replacement or direct shop addition for use with standard 3/8-inch tap holders, T-handle wrenches, and tapping machines configured for 3/8-24 UNF tooling.

Installation Notes

Tapping operations should be performed by a qualified machinist or maintenance mechanic familiar with thread cutting practices. Always secure the workpiece and use the appropriate cutting fluid for the material being tapped to reduce heat and extend tap life. Start with the taper tap to establish thread alignment before progressing to plug and bottoming taps. Do not force a tap if it binds — back off to break the chip and re-apply cutting fluid before continuing.