Value Collection JY79772141 Pipe Tap 4-8 Npt 10 Flutes

Product Description

The VALUE COLLECTION JY79772141 is a standard NPT pipe tap designed for cutting internal tapered threads in pipe fittings, valves, and heavy-walled pipe assemblies. Built from carbon steel with a bright, uncoated finish, this tap features 10 flutes for efficient chip evacuation during threading operations. It carries a 4-8 thread size designation, meaning a 4-inch nominal pipe diameter with 8 threads per inch per NPT specification. Overall length is 7 inches with a thread length of 2.75 inches. The shank diameter measures 3 inches and the square drive size is 2.25 inches. Plumbers, pipefitters, and mechanical contractors performing large-diameter pipe threading will find this tap suited to demanding production or maintenance environments.

This tap is intended for use in applications requiring NPT-compliant tapered internal threads in large-diameter piping systems. Typical installation scenarios include industrial process piping, commercial plumbing headers, fire suppression manifolds, and mechanical room pipe assemblies where 4-inch threaded connections are specified. The regular hook geometry and 10-flute design support use in ferrous and compatible non-ferrous materials. This is a single-unit item and is used directly in a tap wrench, machine spindle, or tapping head sized for the 3-inch shank diameter.

Key Features

• NPT tapered thread form for leak-resistant pipe connections per ANSI B1.20.1
• 10-flute design promotes chip clearance and reduces cutting resistance in large-diameter threading
• Carbon steel construction provides adequate hardness for threading standard pipe materials
• Bright, uncoated finish allows straightforward visual inspection of cutting edges before and after use
• Regular hook geometry suits general-purpose tapping applications
• 3-inch shank diameter and 2.25-inch square drive accommodate large tapping heads and machine spindles

Compatibility

Designed for cutting 4-8 NPT internal tapered threads in pipe fittings, flanges, and heavy-walled assemblies where a 4-inch nominal pipe thread connection is required.

Installation Notes

This tap should be installed and operated by a qualified pipefitter, plumber, or machinist familiar with large-diameter tapping procedures. Ensure the workpiece is securely fixtured and the tapping head or wrench is properly aligned with the pilot hole before applying cutting force. Use an appropriate cutting fluid for the material being tapped to extend tap life and produce clean thread forms. Depressurize, drain, and lock out any piping system before threading in-line fittings or existing assemblies.