Eagle Cutting Tool HT-15000-12-B-I Hss Hand Bottom Tap

Product Description

The EAGLE CUTTING TOOL HT-15000-12-B-I is a high-speed steel (HSS) hand bottom tap sized at 1-1/2 inches with a 12 threads-per-inch (TPI) pitch. Bottom taps are ground with minimal chamfer on the leading threads, allowing the tap to cut threads as close to the bottom of a blind hole as possible. This tool is used by hand with a tap wrench for threading operations where full thread depth near the closed end of a bore is required. At 0.31 pounds, it is a compact tool suited for bench work and field tapping tasks.

This bottom tap is used in threading applications where a blind hole must be threaded to near-full depth, leaving little clearance at the base. It is a common tool in mechanical assembly, maintenance and repair, fabrication shops, and plumbing or HVAC equipment servicing where large-diameter fastener threads need to be cut or restored by hand. The 1-1/2 inch by 12 TPI specification is a standard Unified National Fine (UNF)-adjacent coarse-pitch size used in heavy mechanical and piping contexts.

Key Features

• Bottom chamfer profile allows threading to the base of blind holes
• High-speed steel (HSS) construction provides hardness and wear resistance for threading steel, iron, and non-ferrous metals
• 1-1/2 inch diameter with 12 TPI pitch for large-diameter threaded connections
• Hand tap design used with a standard tap wrench — no machine required
• Lightweight at 0.31 pounds for easy handling and portability

Compatibility

Designed as an OEM-style replacement or standard hand tool for use in any application requiring a 1-1/2 inch by 12 TPI bottom tap in HSS.

Installation Notes

This tap is installed by hand using a tap wrench; secure the workpiece firmly before beginning to avoid tap breakage. Always back the tap off a partial turn periodically to break chips when threading deeper holes. Ensure the tap is started square to the hole to prevent cross-threading or tool damage. Cutting fluid appropriate to the workpiece material is recommended to extend tap life and improve thread finish.