Helicoil
Helicoil 1CPB Straight Flute Hand Tap #12-24 UNC Plug 3 Flutes
Straight flute hand tap cuts #12-24 UNC threads with a plug chamfer and three flutes
- TypeHole, Drill, Bore & Wire Gauges
- Threaded inserts cut cleanly with straight-flute design
- High-speed steel construction resists wear during repeated tapping
- #12-24 UNC sizing matches standard coarse-thread applications
- Plug chamfer starts threads easily in through-holes
- Three flutes evacuate chips efficiently for smooth cutting
Thread Repair Tap
The Helicoil 1CPB is a straight flute hand tap designed for creating internal threads that accept screw thread inserts. It suits mechanics and technicians who repair stripped or damaged holes in softer materials. The tool cuts a #12-24 UNC thread form with a plug chamfer for through-hole or deep blind-hole starting. Three flutes provide chip clearance during manual operation.
High Speed Steel Construction
Bright uncoated high speed steel resists wear during repeated hand tapping. The right hand cutting direction follows standard thread convention. Overall length measures 2 23/32 in with a 1 1/8 in thread length for reach. H2 thread limit ensures proper fit for standard inserts. No lubrication system is integrated so cutting fluid must be applied separately.
Insert Compatibility
This tap produces threads sized specifically for Helicoil screw thread inserts in #12-24 UNC. It does not cut standard fastener threads directly. Builders needing a different thread size, pitch or insert system must select another tap. The plug chamfer is not suited for shallow blind holes that require a bottoming chamfer.
Highlights
- Threaded inserts cut cleanly with straight-flute design
- High-speed steel construction resists wear during repeated tapping
- #12-24 UNC sizing matches standard coarse-thread applications
- Plug chamfer starts threads easily in through-holes
- Three flutes evacuate chips efficiently for smooth cutting
Specifications
| Brand | Helicoil |
|---|---|
| Type | Hole, Drill, Bore & Wire Gauges |
Questions about this item
How do you install the #12-24 UNC straight flute hand tap and what step is commonly missed?
Drill the correct tap drill hole for #12-24 UNC, apply cutting fluid, start the H2 limit plug tap square to the hole, and reverse frequently to break chips; the step most often missed is keeping the tap perfectly perpendicular during entry.
What maintenance or replacement will the high speed steel tap need after repeated threading?
The bright uncoated high speed steel cutting edges will dull with use; replace the tap when thread quality degrades or flutes show wear, as resharpening a three flute plug tap requires precision grinding.
What limit appears first during sustained tapping of #12-24 holes in steel?
Chip evacuation in the three straight flutes becomes the limiting factor; chips pack the flutes, increasing torque and risk of tap breakage if the tap is not backed out and cleared every few turns.
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