Eagle Cutting Tool PT-3750-18-I Hss Npt Pipe Tap 3/8-18

Product Description

The EAGLE CUTTING TOOL PT-3750-18-I is a high-speed steel (HSS) NPT pipe tap sized 3/8-18, designed to cut tapered pipe threads in ferrous and non-ferrous materials. NPT stands for National Pipe Taper, the standard thread form used throughout plumbing, HVAC, and industrial piping systems in North America. This tap produces a 3/8-inch nominal pipe thread at 18 threads per inch, creating a pressure-sealing taper that accepts standard NPT fittings. Plumbers, pipefitters, and HVAC technicians reach for this tool when threading ports, bosses, or new openings in pipe assemblies, manifolds, and equipment housings.

This tap is suited for use in residential and light commercial plumbing, gas line work, and HVAC refrigerant or hydronic piping applications where NPT-threaded connections are required. It is commonly used to thread steel, iron, brass, and similar materials. The 3/8-18 NPT size is one of the most frequently encountered thread sizes in plumbing and gas distribution, appearing in shutoff valves, pressure gauges, sensors, and pipe nipple connections across a wide range of systems.

Key Features

• High-speed steel (HSS) construction provides durability and heat resistance during threading operations
• 3/8-18 NPT taper thread form produces pressure-sealing threads per ANSI/ASME B1.20.1 standards
• Tapered thread geometry provides leak-resistant joints when assembled with compatible NPT fittings
• Import designation offers a cost-effective option for general-purpose threading tasks
• Minimum order quantity of 1 allows single-unit purchase for service and repair use

Compatibility

Designed for cutting 3/8-18 NPT tapered pipe threads in steel, iron, brass, and similar machinable metals commonly found in plumbing, gas, and HVAC piping systems.

Installation Notes

This tap is installed using a standard tap wrench or machine chuck rated for the tool diameter. Always apply a suitable cutting fluid when tapping ferrous materials to reduce heat buildup and extend tool life. Ensure the workpiece is securely clamped and the tap is started square to the hole to avoid cross-threading or tap breakage. Follow applicable codes such as the IPC or IFGC when threading connections in plumbing or gas piping systems.

Technical Specifications

• Thread Size: 3/8-18 NPT
• Thread Standard: NPT (National Pipe Taper)
• Material: High-Speed Steel (HSS)
• Weight: 2.12 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: PT-3750-18-I