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

Product Description

The EAGLE CUTTING TOOL HT-3750-16-P-D is a 3/8-16 high-speed steel (HSS) hand plug tap manufactured in the USA. Plug taps feature a chamfer of 3 to 5 threads, making them the standard starting choice for threading through holes or beginning threads in blind holes after a taper tap has started the cut. The 3/8-16 designation indicates a 3/8-inch nominal diameter with 16 threads per inch (TPI), a Unified National Coarse (UNC) thread form widely used in general mechanical, HVAC, plumbing, and electrical enclosure work. Licensed tradespeople and machinists rely on this tap for field repairs and shop production runs alike.

This tap is suited for hand tapping operations in ferrous and non-ferrous metals, plastics, and similar materials where a 3/8-16 UNC internal thread is required. Common applications include threading mounting holes in mechanical assemblies, equipment frames, junction boxes, pipe hangers, and structural brackets. The plug chamfer geometry makes it practical for most standard through-hole and open blind-hole threading tasks without requiring a taper tap as a precursor.

Key Features

• 3/8-16 UNC thread form for broad compatibility with standard fasteners
• High-speed steel (HSS) construction provides durability and heat resistance during hand tapping
• Plug chamfer (3 to 5 thread lead) suits both through holes and open blind holes
• USA manufactured for consistent dimensional accuracy and thread form quality
• Minimum order quantity of 1 for single-unit procurement

Compatibility

Designed for use with standard 3/8-16 UNC thread applications. Intended for hand tapping operations using a standard tap wrench sized for the tap shank.

Installation Notes

Hand plug taps should be installed by a qualified machinist or tradesperson familiar with tapping procedures. Secure the workpiece before beginning and use the appropriate tap wrench for controlled torque application. Apply cutting fluid or tapping oil throughout the operation to reduce friction and extend tap life. Back off the tap periodically to break and clear chips, particularly in blind holes, to prevent tap breakage.

Technical Specifications

• Thread Size: 3/8-16 UNC
• Tap Type: Hand Plug Tap
• Material: High-Speed Steel (HSS)
• Country of Origin: USA
• Weight: 0.32 pounds

Standard Information

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