Eagle Cutting Tool HT-18750-8-P-I Hss Hand Plug Tap

Product Description

The EAGLE CUTTING TOOL HT-18750-8-P-I is a high-speed steel (HSS) hand plug tap sized 1-7/8 inch diameter with 8 threads per inch (TPI). Plug taps feature a tapered lead of 3 to 5 threads, allowing them to start easily in a pre-drilled hole while cutting full-form threads through most of the hole depth. This tap is intended for hand tapping operations and is suited for machinists, pipefitters, millwrights, and maintenance technicians working with large-diameter threaded fastener applications in steel, iron, and similar ferrous materials.

This tap is used when cutting or restoring coarse unified national coarse (UNC) threads at 1-7/8 inch diameter and 8 TPI. Typical applications include heavy equipment repair, structural fabrication, and industrial maintenance where large-diameter through-hole or blind-hole tapping is required. The plug chamfer style makes it versatile for both through-holes and deeper blind holes where thread runout permits adequate lead-in.

Key Features

• 1-7/8 inch diameter, 8 TPI thread form for large-diameter tapping work
• High-speed steel (HSS) construction provides durability and heat resistance during cutting
• Plug chamfer (3 to 5 thread taper) allows easy starting and full-depth thread cutting
• Designed for hand tapping with a standard tap wrench
• Weighs 4.2 pounds, indicating a full-size, solid-shank tool built for heavy-duty use

Compatibility

Designed as a standard replacement or working tap for 1-7/8 inch-8 UNC threaded applications in industrial, maintenance, and fabrication settings where HSS hand taps are required.

Installation Notes

A licensed machinist or qualified maintenance technician should perform large-diameter hand tapping operations. Always ensure the workpiece is properly secured before tapping, and use a calibrated tap wrench sized for large-diameter taps. Apply cutting fluid appropriate for the workpiece material to reduce friction and extend tap life. Back off the tap periodically to break chips and prevent binding or breakage.

Technical Specifications

• Thread Diameter: 1-7/8 inch
• Thread Pitch: 8 TPI
• Tap Type: Hand Plug Tap
• Material: High-Speed Steel (HSS)
• Weight: 4.2 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-18750-8-P-I