Hertel K008199AS Straight Flute Tap 8-32 Unc Bottoming Hss

Product Description

The HERTEL K008199AS is a straight flute bottoming tap designed to cut right-hand internal threads in through-holes and blind holes where threads must extend close to the bottom. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap runs an 8-32 UNC thread form across a 0.75-inch thread length with a 2.125-inch overall length (OAL). The bottoming chamfer — typically 1 to 2 thread leads — allows threading to within a few threads of the bottom of a blind hole. With 4 straight flutes and an H7 thread limit, this tap suits precision threading applications in ferrous and non-ferrous materials. Machinists, tool-and-die makers, and maintenance technicians use it in manual tap handles or machine tapping setups.

This tap is suited for production and maintenance threading of 8-32 UNC fastener holes in light-gauge steel, aluminum, brass, and similar machinable materials. Typical applications include tapping holes in electrical enclosures, machine frames, fixtures, and precision assemblies where a bottoming tap is required to maximize thread engagement in shallow blind holes. It is commonly used as the final tap in a tap sequence following a taper or plug tap, or as a standalone tap in through-hole applications.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• 4 straight flutes suited for short-chipping materials such as aluminum, brass, and mild steel
• H7 thread limit for consistent fit with standard 8-32 UNC fasteners
• High-speed steel construction provides toughness in hand and machine tapping operations
• Bright, uncoated finish works with standard tapping fluids and cutting oils
• Right-hand thread direction; no coolant-through feature

Compatibility

Designed as an OEM-style replacement or standard production tap for applications requiring 8-32 UNC right-hand internal threads with a bottoming chamfer.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians using a manual tap wrench or a machine tapping attachment. Always use an appropriate tapping fluid or cutting oil for the workpiece material to reduce tool wear and improve thread finish. Ensure the tap is properly aligned perpendicular to the workpiece before beginning the threading operation. When tapping blind holes, clear chips frequently to prevent tap breakage and verify hole depth is sufficient for the required thread length.