Eagle Cutting Tool HT-3750-16-P-I 3/8-16 Hss Hand Plug Tap

Product Description

The EAGLE CUTTING TOOL HT-3750-16-P-I is a 3/8-16 high-speed steel (HSS) hand plug tap designed for cutting internal threads by hand in metalworking and mechanical assembly applications. The plug chamfer style features a gradual lead-in of several tapered threads, making it the standard choice for threading through-holes and deeper blind holes where thread engagement length matters. At 0.31 pounds, this tap is lightweight and easy to handle with a standard tap wrench. Machinists, pipefitters, and maintenance technicians reach for plug taps as the go-to starting point in most hand-tapping operations.

This tap is suited for threading 3/8-inch diameter holes with a 16 threads-per-inch (TPI) pitch, a coarse-thread designation common in general fastener and structural bolt applications across industrial, commercial, and residential maintenance work. It is appropriate for use in steel, cast iron, aluminum, and similar machinable materials when used with appropriate cutting fluid. The import-grade construction makes it a cost-effective option for shops and technicians who need a reliable hand tap for moderate-duty, low-volume threading tasks.

Key Features

• 3/8-16 UNC coarse-thread specification for wide fastener compatibility
• High-speed steel (HSS) construction provides hardness and wear resistance for hand tapping
• Plug chamfer geometry with gradual lead-in threads for smooth thread cutting in through-holes and blind holes
• Lightweight at 0.31 pounds for easy one-hand control with a tap wrench
• Import-grade tap suited for moderate-duty, cost-conscious applications

Compatibility

Designed as a standard hand plug tap for use in any application requiring 3/8-16 UNC internal threads. Compatible with standard tap wrenches and T-handle tap holders sized for the tap shank diameter.

Installation Notes

Hand taps should be installed by a qualified machinist or maintenance technician using an appropriately sized tap wrench. Always drill the correct tap drill size for 3/8-16 threads before tapping, and apply cutting fluid throughout the operation to reduce heat and extend tap life. Back the tap off periodically to break chips and prevent binding or tap breakage. Never force a tap against resistance — a stuck or broken tap is difficult to remove and can destroy the workpiece.

Technical Specifications

• Thread Size: 3/8-16
• Thread Standard: UNC (Unified National Coarse)
• Tap Style: Hand Plug
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-3750-16-P-I