Kennametal 1542891 Hand Tap 5/8-11 Unc Plug 4-flute Hss

Product Description

The KENNAMETAL 1542891 is a 5/8-11 UNC straight-flute hand tap designed for cutting internal threads in a wide range of materials. Built from high-speed steel with a bright, uncoated finish, this tap delivers consistent thread form in cast iron and non-ferrous metals. The plug chamfer configuration provides 3 to 5 chamfered threads, making it well suited for through-hole threading applications where the tap can be started and advanced progressively. With 4 flutes and a right-hand thread direction, it holds Class 3B tolerance at H3 thread limit for close-fit threaded assemblies. Overall length is 3.81 inches with a thread length of 1.813 inches and a shank diameter of 0.48 inches.

This tap is intended for use in maintenance, repair, and production threading operations where 5/8-11 UNC threads are required. It belongs to the KENNAMETAL Series 5305 and 5303 tap family and is suited for hand tapping or low-speed machine tapping in cast iron and non-ferrous metal workpieces. The plug style makes it a common first-choice tap when threading through holes or when starting a threading sequence in a blind hole that will be finished with a bottoming tap.

Key Features

• 5/8-11 UNC thread form, right-hand cut, Class 3B fit at H3 thread limit
• Plug chamfer with 3 to 5 chamfered lead threads for progressive thread starting
• 4-flute straight-flute geometry suited for cast iron and non-ferrous metals
• High-speed steel construction with bright, uncoated finish
• 3.81-inch overall length with 1.813-inch thread length
• 0.48-inch shank diameter compatible with standard tap wrenches and holders

Compatibility

Designed for threading 5/8-11 UNC through holes and blind holes in cast iron and non-ferrous metal workpieces. Part of the KENNAMETAL Series 5305 and 5303 tap lineup.

Installation Notes

This tap is installed by machinists and maintenance technicians using a standard tap wrench or machine tap holder. Power down any machine tool and secure the workpiece before beginning the threading operation. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Avoid forcing the tap against chip buildup — back the tap off periodically to clear chips, particularly in deeper holes.