Kennametal 4130813 Pipe Tap 3/4-14 Npt 5 Flute Hss

Product Description

The KENNAMETAL 4130813 is a standard pipe tap designed to cut 3/4-14 NPT (National Pipe Taper) threads in metal workpieces. It features 5 flutes ground from high-speed steel with a bright, uncoated finish. The overall length is 3.25 inches, and the thread length is 1.375 inches. This tap is used by machinists, pipefitters, and maintenance technicians to create tapered pipe threads in drilled holes for pressure-tight fittings and connections. The regular hook geometry provides a controlled cut suited to a wide range of ferrous and non-ferrous materials.

This tap is suited for threading pipe ports and fittings in HVAC, plumbing, and industrial piping applications. It is most commonly used on manual or machine tap setups when cutting NPT threads in steel, cast iron, brass, or aluminum. The 3/4-14 NPT size is one of the most common trade sizes encountered in gas, water, and refrigerant line connections. It is appropriate for both through-hole and blind-hole applications where NPT tapered threads are specified.

Key Features

• 3/4-14 NPT thread form for standard tapered pipe thread connections
• 5-flute design supports chip clearance and consistent thread form
• High-speed steel construction provides durability across a range of workpiece materials
• Bright, uncoated finish for use with cutting fluid in general-purpose applications
• Overall length of 3.25 inches with a 1.375-inch thread length for standard pipe tap reach
• Regular hook geometry for controlled cutting action on manual and machine tap setups

Compatibility

Designed as a general-purpose NPT pipe tap for 3/4-14 threaded connections in ferrous and non-ferrous materials. Compatible with standard tap wrench drives and machine tap holders accepting a 0.906-inch shank diameter with a 0.679-inch square drive.

Installation Notes

This tap should be installed and operated by a qualified machinist or tradesperson familiar with pipe thread cutting procedures. Always secure the workpiece fully before tapping and use an appropriate cutting fluid to reduce heat and extend tool life. Apply steady, even pressure and back off periodically to break chips, particularly in deeper holes. Verify thread fit with a calibrated NPT thread gauge before assembling any pressure-carrying fittings.