Eagle Cutting Tool HT-3750-16-B-I 3/8-16 Hss Hand Bottom Tap

Product Description

The EAGLE CUTTING TOOL HT-3750-16-B-I is a 3/8-16 high-speed steel (HSS) hand bottom tap designed for threading blind holes to the full depth of the bore. The bottom tap geometry features minimal lead threads, allowing it to cut threads closer to the bottom of a hole than a taper or plug tap. At 0.31 pounds, this is a lightweight, hand-drive tool suited for bench work, field repairs, and maintenance threading operations. It is sized for the common 3/8-16 UNC thread standard, one of the most frequently used coarse-thread sizes in mechanical and structural fastening.

This tap is used in metalworking, maintenance, and repair applications where a blind threaded hole must be threaded to near-full depth. Typical scenarios include restoring damaged threads in steel, aluminum, and cast iron components, or adding new threaded holes in machine parts, brackets, and fixtures. It is a hand-driven tool and is not intended for power tapping operations. Machinists, millwrights, maintenance technicians, and HVAC or plumbing service techs working on equipment frames and mounting hardware will find this size on the bench regularly.

Key Features

• Bottom tap profile allows threading to near-full depth in blind holes
• 3/8-16 UNC thread form — common coarse-thread standard for fastening applications
• High-speed steel (HSS) construction for cutting hardness and durability
• Hand-drive design compatible with standard tap wrenches and T-handles
• Lightweight at 0.31 pounds for easy handling during bench or field work

Compatibility

Designed as an OEM-style replacement or standard hand tap for use in any application requiring 3/8-16 UNC threaded holes, particularly blind-hole threading where a bottom tap is required.

Installation Notes

This tap is intended for hand-drive use only with a tap wrench or T-handle; do not use in a power drill or tapping head without confirming the tool is rated for that use. Always use a cutting fluid appropriate for the workpiece material to extend tool life and produce cleaner threads. Back the tap out periodically to break chips, especially in deep blind holes. Inspect the tap for chipping or wear before each use, as a damaged tap can seize or break in the workpiece.

Technical Specifications

• Thread Size: 3/8-16 UNC
• Tap Type: Hand Bottom Tap
• 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-B-I