Hertel K020137AS M4.5x0.75 Plug Hand Tap Hss Metric Coarse

Product Description

The HERTEL K020137AS is a straight-flute hand tap designed for cutting internal M4.5x0.75 metric coarse threads in a right-hand direction. Manufactured from high speed steel with a bright uncoated finish, it is built for durability and dimensional consistency in light-duty tapping operations. The plug chamfer style, with a standard 3-5 thread lead, provides a balanced starting action suited to through-holes and blind holes with adequate clearance. The 4-flute straight-flute geometry delivers clean chip evacuation in a variety of ferrous and non-ferrous materials. With an overall length of 2.375 inches and a thread length of 0.875 inches, this tap fits standard tap wrenches used in machine shops, maintenance facilities, and field service environments.

This tap is intended for hand tapping operations where a standard plug chamfer is required to thread M4.5x0.75 metric coarse holes. It is a common choice for maintenance, repair, and overhaul work, as well as prototype machining and production tapping in low-volume settings. The D2 thread limit designation controls the pitch diameter tolerance of the finished thread, making it appropriate for general-purpose metric thread fits. It is used by machinists, millwrights, and maintenance technicians across industrial and manufacturing environments.

Key Features

• M4.5x0.75 metric coarse thread form with right-hand cutting direction
• Plug chamfer for versatile use in through-holes and adequately deep blind holes
• 4-flute straight-flute design supports chip clearance and thread form accuracy
• High speed steel construction provides good wear resistance across common workpiece materials
• Bright uncoated finish maintains close dimensional tolerances out of the box
• D2 thread limit for general-purpose metric thread fits

Compatibility

Designed as an OEM-style replacement or direct-use hand tap for standard M4.5x0.75 metric coarse tapping applications using common tap wrenches and holders sized for the 0.194-inch shank diameter.

Installation Notes

Hand tapping should be performed by a qualified machinist or maintenance technician following standard tapping procedures. Secure the workpiece firmly before starting and use an appropriate cutting fluid to reduce friction and extend tap life. Back the tap off periodically to break chips and prevent binding. Never force a tap that has stalled, as high speed steel taps are brittle under torsional overload and may fracture.