Kennametal 1544108 M10x1.50 Bottoming Hand Tap Hss 6H

Product Description

The KENNAMETAL 1544108 is a straight-flute hand tap designed for cutting M10x1.50 metric coarse internal threads in a bottoming configuration. Manufactured from high-speed steel (HSS) with a bright, uncoated finish, this 4-flute tap produces clean threads in blind holes where full thread depth close to the bottom is required. With an overall length of 2.94 inches and a thread length of 1.25 inches, it is sized for standard M10 tapping applications in hand or machine tap wrench setups. The right-hand, 6H class-of-fit and D6 thread limit keep finished threads within standard tolerance for metric fastener assembly.

This tap is rated for use in cast iron and non-ferrous metals, making it a practical choice for maintenance, repair, and production threading in automotive, mechanical, and general fabrication settings. The bottoming chamfer — typically 1 to 2 threads of lead — allows threading to within a few threads of a blind-hole bottom, which is the defining reason to select this style over a taper or plug tap. It is typically the third tap used in a hand-tapping sequence after a taper and plug tap have been run through the hole first.

Key Features

• Bottoming chamfer for full thread depth in blind holes
• 4-flute straight-flute geometry for clean chip handling in through and shallow blind holes
• High-speed steel construction for durability across cast iron and non-ferrous materials
• Bright, uncoated finish — no coating to alter tap geometry or thread tolerance
• 6H class of fit and D6 thread limit for standard metric fastener assembly tolerance
• Right-hand thread direction, M10x1.50 metric coarse pitch

Compatibility

Designed for hand tapping or tap-wrench use in M10x1.50 metric coarse thread applications in cast iron and non-ferrous metal workpieces. Rated to 6H class of fit per metric thread standards.

Installation Notes

A licensed machinist or experienced technician should verify the correct tap drill size for M10x1.50 threads before use. Secure the workpiece fully before tapping and apply a suitable cutting fluid for the workpiece material to extend tap life and improve thread quality. When used in a hand-tapping sequence, run a taper and plug tap first; use this bottoming tap last. Do not force the tap if resistance increases sharply — back off to break chips and avoid tap breakage.