Hertel 793U1-1/4 Pipe Tap 1-1/4 11-1/2 Npt 5 Flutes

Product Description

The HERTEL 793U1-1/4 is a standard pipe tap designed to cut NPT (National Pipe Taper) internal threads in metal workpieces. With a 1-1/4 inch to 11-1/2 thread size and 5-flute geometry, this tap produces clean, tapered pipe threads used to create pressure-tight connections in piping systems. Constructed from carbon steel with a bright, uncoated finish, it offers reliable performance for standard tapping operations in ferrous and non-ferrous materials. The overall length is 4 inches, and the shank diameter measures 1.3125 inches. It is suited for use in machining shops, plumbing fabrication, and maintenance environments where standard NPT tapped fittings are required.

This tap is used in applications where NPT pipe threads must be cut into components such as fittings, manifolds, valve bodies, and pipe flanges. It is appropriate for both production tapping and maintenance repair work in commercial and industrial settings. Plumbers, pipefitters, and machinists commonly use this tool when fabricating or reworking threaded pipe connections in pressurized fluid and gas systems. The 5-flute design provides good chip distribution across the cutting faces during the threading operation.

Key Features

• NPT taper thread form for pressure-tight pipe connections
• 1-1/4 inch to 11-1/2 thread size for larger-diameter pipe tapping
• 5-flute geometry for improved chip load distribution
• Carbon steel construction for general-purpose tapping durability
• Bright, uncoated finish suitable for use with standard cutting fluids
• 4-inch overall length with 1.3125-inch shank diameter

Compatibility

Designed as a standard NPT pipe tap for use in any application requiring a 1-1/4 inch to 11-1/2 NPT internal thread, compatible with standard tap holders and machines accepting a 1.3125-inch shank diameter.

Installation Notes

This tap should be installed and operated by a qualified machinist, pipefitter, or plumber familiar with threading operations. Always secure the workpiece properly and use an appropriate cutting fluid to reduce heat and extend tool life. Ensure the tap is aligned square to the hole before beginning the cut to avoid thread damage or tap breakage. Follow applicable OSHA and shop safety guidelines when operating tapping equipment.