Hertel K010455AS Thread Forming Tap M5x0.8 Bottoming Hss

Product Description

The HERTEL K010455AS is a metric thread forming tap designed for blind hole threading applications in metalworking and machining environments. Unlike cutting taps, thread forming taps displace material rather than cut it, producing stronger threads with no chips to clear. This tap is configured with a bottoming chamfer of 1 to 2 threads, allowing it to form threads close to the bottom of a blind hole. It is manufactured from high-speed steel (HSS) with a bright, uncoated finish. The overall length is 2.375 inches and the thread length is 0.875 inches. Machinists, toolmakers, and CNC operators in production and maintenance environments are the primary users of this tap.

This tap is suited for metric M5x0.8 threading in blind holes where thread integrity close to the bottom of the hole is required. The bottoming chamfer makes it appropriate as a finishing tap after a plug or spiral tap has started the thread. Typical applications include tapping pre-drilled holes in steel, aluminum, and similar ductile metals in manufacturing, maintenance, and repair operations. It is sized for hand tapping setups or use in tapping heads and CNC machines equipped with appropriate holders for a 0.194-inch shank diameter.

Key Features

• Thread forming (cold-forming) process eliminates chips and produces stronger threads than cut tapping
• Bottoming chamfer (1 to 2P) allows threading to within 1 to 2 pitches of blind hole bottom
• M5x0.8 metric thread size with right-hand thread direction
• High-speed steel construction provides hardness and wear resistance for general machining use
• Bright, uncoated finish suits standard tapping applications without added coating cost
• D7 thread limit for consistent thread fit and tolerance control

Compatibility

Designed for use in blind hole threading of ductile materials requiring M5x0.8 metric right-hand threads. No specific machine or system compatibility data was provided for this part.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which differs from standard tap drill sizes — consult a forming tap drill chart for M5x0.8 before drilling. Use appropriate tapping fluid or cutting oil for the workpiece material to reduce torque and extend tool life. Secure the workpiece and ensure the tap is driven perpendicular to the hole to avoid tap breakage. This tap is intended for use by trained machinists familiar with thread forming operations and proper tap holder selection.