Hertel K008563AS 5/8-11 Unc Straight Flute Tap Hss

Product Description

The HERTEL K008563AS is a straight flute tap designed for cutting 5/8-11 UNC internal threads in a variety of materials. Built from high speed steel with a bright/uncoated finish, this plug chamfer tap features 4 flutes and a right-hand thread direction. It carries a Class 2B thread fit and an H5 thread limit, making it suitable for standard tolerance threading applications. With an overall length of 3-13/16 inches and a weight of 0.6 pounds, it is sized for use in standard tap handles, CNC machining centers, and manual drill press setups where straight flute geometry is preferred.

This tap is used in machine shops, maintenance facilities, and field repair settings where 5/8-11 UNC threads are required. Straight flute taps are well suited for threading short-chipping materials such as cast iron, brass, and hardened plastics. The plug chamfer — typically 3 to 5 threads of taper — allows the tap to start easily in a through-hole or a deep blind hole where starting clearance is adequate. It is installed by machinists and maintenance technicians working to ASME B1.1 UNC thread standards.

Key Features

• 5/8-11 UNC right-hand thread form to ASME B1.1 standards
• High speed steel construction for durability in general-purpose threading
• Bright/uncoated finish suitable for use with standard cutting fluids
• 4 straight flutes for efficient chip clearance in short-chipping materials
• Plug chamfer for easy entry in through-holes and adequate-depth blind holes
• Class 2B fit with H5 thread limit for standard tolerance internal threads

Compatibility

Designed as an OEM-style replacement or direct-use straight flute tap for standard 5/8-11 UNC threading applications in manual tap handles and CNC tapping operations.

Installation Notes

This tap is installed by machinists or maintenance technicians using a tap handle, tapping head, or CNC rigid tapping cycle. Always ensure the pilot hole is drilled to the correct diameter for 5/8-11 UNC threads before tapping. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Do not force the tap if resistance increases suddenly — back off to break chips before continuing.