Eagle Cutting Tool HT-1228-T-I Hss Hand Taper Tap 12-28

Product Description

The EAGLE CUTTING TOOL HT-1228-T-I is a high-speed steel (HSS) hand taper tap ground to a 12-28 thread specification. Taper taps are the standard starting tap for initiating threads in through holes or blind holes with adequate depth, cutting gradually over the first several threads to reduce torque and ease entry. This tap is designed for manual hand tapping operations using a tap wrench or T-handle, making it a go-to tool for machinists, pipefitters, maintenance technicians, and general metalworkers who need accurate, clean internal threads in ferrous and non-ferrous materials.

The 12-28 thread designation refers to a No. 12 major diameter with 28 threads per inch, a fine-pitch unified national thread form (UNF) commonly found in precision mechanical assemblies, electrical enclosures, and light machinery. This tap is suited for production shops, maintenance and repair operations (MRO), and field service work where a reliable, cost-effective import-grade tap meets the job requirements without the premium of domestic tooling.

Key Features

• HSS construction provides adequate hardness and wear resistance for threading steel, aluminum, brass, and similar materials
• Taper chamfer (approximately 8-10 threads) eases starting and reduces torque demand during hand tapping
• 12-28 UNF thread form suits precision fastener applications requiring fine pitch
• Designed for hand tapping with standard tap wrenches or T-handles
• Import-grade pricing supports high-volume MRO and shop stock replenishment

Compatibility

Designed as a standard replacement or stock tap for 12-28 UNF hand tapping applications in general machining, maintenance, and repair operations.

Installation Notes

A licensed machinist or qualified technician should select the correct tap drill size for the 12-28 thread form before beginning. Always apply appropriate cutting fluid to the tap and workpiece to reduce friction and extend tool life. Back off the tap periodically to break chips, especially in blind holes. Discard any tap that shows signs of chipping, cracking, or excessive wear to avoid broken-tap extraction issues.

Technical Specifications

• Thread Size: 12-28
• Thread Form: UNF (Unified National Fine)
• Material: High-Speed Steel (HSS)
• Tap Type: Hand Taper Tap
• Weight: 0.31 pounds

Standard Information

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