Eagle Cutting Tool HT-1228-P-I Hss Hand Plug Tap 12-28

Product Description

The EAGLE CUTTING TOOL HT-1228-P-I is a 12-28 thread high-speed steel (HSS) hand plug tap designed for cutting internal threads in metal workpieces. The plug chamfer — typically 3 to 5 threads of lead — makes it a versatile choice for threading through-holes and moderately deep blind holes. Built from HSS, the tap offers the hardness and wear resistance needed for production threading in ferrous and non-ferrous metals. Machinists, pipefitters, and maintenance technicians commonly reach for this style of tap during fabrication, repair, and assembly operations.

This tap is suited for hand tapping applications where a plug chamfer provides enough lead-in to start the tap squarely and cut cleanly. The 12-28 thread designation identifies a No. 12 screw size with 28 threads per inch, a fine-pitch specification used in precision assemblies, instrument enclosures, and electrical panel work where a standard coarse-pitch thread is too aggressive for the material thickness or joint requirement. It is appropriate for use in shop, field, and maintenance environments.

Key Features

• HSS construction provides hardness and heat resistance for threading steel, aluminum, brass, and similar metals
• Plug chamfer (3-5 thread lead) balances starting ease with cutting performance in through-holes and open blind holes
• 12-28 thread form suits fine-pitch applications in thin-wall or precision assemblies
• Hand tap design compatible with standard tap wrenches and T-handle drivers
• Lightweight at 0.31 pounds, easy to transport and store in a field tool kit

Compatibility

Designed as a standard hand plug tap for cutting 12-28 internal threads in workpieces where a plug-chamfer lead is required. Fits standard tap wrench drives sized for No. 12 taps.

Installation Notes

Hand tapping should be performed by a qualified machinist or tradesperson following standard threading practices. Always secure the workpiece before tapping and use an appropriate cutting fluid to reduce friction and extend tap life. Back the tap off periodically to break chips and prevent tap breakage, especially in blind holes. Follow shop safety procedures and applicable standards when working with cutting tools.

Technical Specifications

• Thread Size: 12-28
• Tap Type: Hand Plug Tap
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-1228-P-I