Eagle Cutting Tool PT-35000-8-I Hss Npt Pipe Tap

Product Description

The EAGLE CUTTING TOOL PT-35000-8-I is a high-speed steel (HSS) NPT pipe tap sized at 3-1/2 inches with 8 threads per inch (TPI). It cuts tapered National Pipe Thread (NPT) threads into pipe ends and pipe fittings, conforming to the standard taper profile required for pressure-tight connections. Plumbers, pipefitters, and mechanical contractors use this tap when threading large-diameter pipe in the field or shop. At 4 pounds, this is a heavy-duty tool sized for substantial material removal in pipe threading applications.

This tap is suited for large-diameter piping work in industrial, commercial, and heavy mechanical environments. The 3-1/2-inch NPT size is most commonly encountered in industrial process piping, large commercial plumbing headers, and heavy mechanical system installations. A threading machine or large tap wrench with adequate torque capacity is required for a tap of this size. It is not a common residential application tool.

Key Features

• HSS construction provides hardness and wear resistance for threading steel and iron pipe
• 3-1/2-inch NPT size handles large-diameter pipe threading in industrial and commercial applications
• 8 TPI thread pitch conforms to the NPT standard taper specification for that pipe size
• Tapered thread form creates pressure-sealing engagement without additional fittings or inserts
• Minimum order quantity of 1 unit, suitable for single-job procurement

Compatibility

Designed as an OEM-style replacement or direct-use tap for threading 3-1/2-inch NPT connections in steel, cast iron, or ductile iron pipe and fittings where the NPT taper standard applies.

Installation Notes

This tap should be installed and operated by a qualified pipefitter, plumber, or machinist familiar with large-diameter pipe threading procedures. A power threading machine or heavy-duty tap wrench rated for the torque demands of a 3-1/2-inch tap is required. Apply a suitable cutting oil throughout the threading operation to reduce heat and extend tool life. Always deburr and chamfer the pipe end before tapping to reduce the risk of tap breakage.

Technical Specifications

• Thread Standard: NPT (National Pipe Taper)
• Tap Size: 3-1/2 inches
• Threads Per Inch (TPI): 8
• Material: High-Speed Steel (HSS)
• Weight: 4 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: PT-35000-8-I