Hertel K008572AS Hand Tap 5/8-18 Unf Plug 4-flute Hss

Product Description

The HERTEL K008572AS is a 5/8-18 UNF straight flute hand tap designed for cutting right-hand internal threads in a wide range of materials. Built from high speed steel with a bright uncoated finish, this plug chamfer tap provides a balanced entry suitable for through-holes and most standard tapping applications. The H2 thread limit ensures close dimensional control, making it a reliable choice for production and maintenance work. Four flutes provide adequate chip clearance for general-purpose use. Overall length is 3-13/16 inches with a thread length of 1-13/16 inches. Licensed machinists, tool-and-die makers, and maintenance mechanics reach for this style of tap when cutting UNF threads by hand or with a low-speed machine setup.

This tap is suited for threading operations in ferrous metals, non-ferrous alloys, and plastics where a 5/8-18 UNF thread form is required. The plug chamfer - typically 3 to 5 threads of lead - makes it the standard first-choice tap for most through-hole and moderate-depth blind-hole jobs. It is commonly used in maintenance, repair, and fabrication environments across industrial, HVAC equipment manufacturing, and mechanical assembly applications.

Key Features

• 5/8-18 UNF thread form with right-hand cutting direction
• Plug chamfer entry for versatile use in through-holes and standard blind holes
• High speed steel construction for durability across a broad range of workpiece materials
• Bright uncoated finish suitable for use with standard cutting fluids
• H2 thread limit for consistent, close-tolerance thread output
• 4-flute straight flute geometry for reliable chip clearance in general-purpose tapping

Compatibility

Designed as a standard 5/8-18 UNF plug hand tap for use with conventional tap wrenches and low-speed tapping machines that accept a 0.480-inch shank diameter with a 0.360-inch square drive.

Installation Notes

This tap is installed by qualified machinists or mechanics using a properly sized tap wrench or tapping fixture. Ensure the workpiece is securely clamped and the tap is started square to the hole before applying torque. Use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Never force the tap through a hole that is undersized for a 5/8-18 UNF thread - verify the correct tap drill diameter before beginning.