Eagle Cutting Tool HT-13750-8-B-D 1-3/8-8 Hss Hand Bottom Tap

Product Description

The EAGLE CUTTING TOOL HT-13750-8-B-D is a 1-3/8 inch diameter, 8 threads-per-inch (TPI) high-speed steel (HSS) hand bottom tap manufactured in the USA. Bottom taps feature minimal chamfer on the cutting end, allowing threads to be cut as close to the base of a blind hole as possible. This tap is driven by hand with a tap wrench and is suited for threading operations in metal fabrication, maintenance, and repair work. Machinists, millwrights, pipefitters, and general maintenance technicians use this tool when a through-tap or plug tap cannot fully thread a blind hole to the required depth.

The HT-13750-8-B-D is designed for hand tapping applications where full thread depth in a blind or stopped hole is required. The 1-3/8 inch-8 thread form is common in heavy industrial and structural fastening applications. This tap is well suited for repair work on existing threaded bores, re-threading damaged holes, or completing thread runs started with a taper or plug tap in a production or field service setting.

Key Features

• Bottom tap geometry allows threading to within 1-2 threads of the base of a blind hole
• High-speed steel (HSS) construction provides hardness and wear resistance for threading ferrous and non-ferrous metals
• 1-3/8 inch diameter with 8 TPI unified coarse thread form
• USA manufactured for consistent dimensional accuracy and tool life
• Hand tap style — compatible with standard tap wrenches sized for large-diameter taps

Compatibility

Designed as an OEM-style replacement or direct-use hand bottom tap for 1-3/8 inch-8 threaded applications in industrial maintenance, fabrication, and repair environments.

Installation Notes

This tap is installed and operated by a machinist or skilled trades professional using an appropriately sized tap wrench. Always ensure the workpiece is securely clamped before beginning the tapping operation. Apply cutting fluid appropriate for the workpiece material to reduce heat and extend tool life. Back off the tap periodically to break chips and prevent binding, especially in deep blind holes.

Technical Specifications

• Thread Size: 1-3/8 inches
• Threads Per Inch (TPI): 8
• Tap Type: Hand Bottom Tap
• Material: High-Speed Steel (HSS)
• Country of Origin: USA
• Weight: 1.78 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-13750-8-B-D