Hertel K008935AS Tap Set 11/16-11 Uns 4 Flute Hss

Product Description

The HERTEL K008935AS is a 3-piece tap set ground to an 11/16-11 UNS thread specification, designed for cutting right-hand internal threads in metal workpieces. Built from high speed steel with a bright finish, the set delivers consistent cutting performance across a 4-flute geometry that evacuates chips efficiently during threading operations. The overall length measures 4-1/32 inches, with a thread length of 1-13/16 inches. The H3 thread limit and 2B/3B class of fit make this set well-suited for general-purpose threading applications requiring standard tolerance control. Licensed machinists, maintenance technicians, and tool-and-die professionals are the typical users.

This tap set is used in machining environments where UNS (Unified National Special) threads are required — most commonly in repair and replacement work on legacy or custom-specification fastener configurations. The right-hand thread direction and 4-flute design suit it for use in drill presses, CNC tap cycles, and hand-tapping operations on steel, cast iron, and similar ferrous materials. The 3-piece set typically includes taper, plug, and bottoming taps to cover through-hole and blind-hole applications in a single kit.

Key Features

• 11/16-11 UNS thread specification for non-standard unified thread applications
• High speed steel construction for durability in ferrous and non-ferrous metals
• 4-flute geometry promotes efficient chip evacuation during threading
• Bright finish with H3 thread limit for standard tolerance threading
• 2B and 3B class of fit covers both standard and close-tolerance requirements
• Right-hand thread direction compatible with conventional tapping setups

Compatibility

Designed for use in applications requiring 11/16-11 UNS right-hand internal threads. Suitable for hand-tapping and machine-tapping operations in compatible drill presses, tapping heads, or CNC machining centers with appropriate tap holders for the shank size.

Installation Notes

Tapping operations should be performed by a qualified machinist or maintenance technician familiar with thread-cutting procedures. Ensure the workpiece is securely fixtured and properly center-drilled to the correct tap drill size before beginning. Use appropriate cutting fluid for the base material to extend tap life and improve thread finish. For machine tapping, confirm spindle speed and feed rate are set correctly for the material and tap geometry before engaging the cut.