Eagle Cutting Tool HT-5000-20-B-I 1/2 20 Hss Bottom Tap

Product Description

The EAGLE CUTTING TOOL HT-5000-20-B-I is a 1/2-20 high-speed steel (HSS) hand bottom tap designed to cut threads to the bottom of a blind hole. Bottom taps have minimal lead threads, allowing the tap to reach full thread form close to the floor of a drilled hole. This tool is used manually with a tap wrench and is suited for threading operations in metal and other materials where a blind hole must be fully threaded. At 0.31 pounds, it is a lightweight, hand-held tool appropriate for machine shop, maintenance, and field repair applications.

This bottom tap is used wherever a blind hole requires complete threading with minimal unthreaded runout at the base. Common applications include threading holes in steel, aluminum, and cast materials during fabrication, repair, or assembly work. Machinists, millwrights, pipefitters, and maintenance technicians reach for a bottom tap when a plug or taper tap has already started the thread and full-depth threading is required to accommodate a fastener or fitting that must seat at the bottom of the hole.

Key Features

• 1/2-20 thread form for fine-thread applications requiring strong thread engagement
• High-speed steel (HSS) construction provides hardness and wear resistance for threading ferrous and non-ferrous metals
• Bottom tap geometry with minimal lead threads allows threading to the floor of a blind hole
• Hand tap design for use with a standard tap wrench — no machine required
• Lightweight at 0.31 pounds for easy one-hand operation

Compatibility

Designed as an OEM-style replacement or standard hand tap for use in any application requiring a 1/2-20 UNF bottom tap in high-speed steel.

Installation Notes

This tap is installed by hand using a tap wrench — secure the workpiece before starting. Always use a cutting fluid appropriate for the material being threaded to extend tap life and improve thread quality. Start with a taper or plug tap to establish the thread before finishing with this bottom tap. Back the tap off periodically to break chips and prevent binding or breakage in the hole.

Technical Specifications

• Thread Size: 1/2-20
• Thread Form: UNF (Unified National Fine)
• 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-5000-20-B-I