Cleveland
Cleveland C54742 Straight Flute Hand Tap 1/2"-20 UNF Plug HSS
A straight-flute hand tap for 1/2"-20 UNF threads, made from high-speed steel with a plug chamfer and 1.66 in thread length
- TypeTaps
- Cuts precise 1/2"-20 UNF threads with straight-flute design
- Plug chamfer starts threads easily in through-holes
- High-speed steel body resists wear during hand tapping
- 38 in overall length gives good leverage and control
- 66 in thread length matches standard depth requirements
Cleveland C54742 UNF Hand Tap
The Cleveland C54742 is a straight-flute hand tap designed to cut 1/2"-20 UNF internal threads in a variety of materials. It is intended for machinists, maintenance technicians and hobbyists who need to create or repair fine-pitch threads using hand or light machine tapping operations.
Sustained cutting performance
High-speed steel construction resists wear during repeated passes, while the bright uncoated finish reduces galling in softer metals. The plug chamfer provides a moderate lead that clears chips steadily through the 1.66 in thread length, helping maintain consistent thread quality over the full 3.38 in overall length during extended use.
Pre-order compatibility check
Verify that your workpiece material suits an H5 limit tap for a 2B class of fit and that you have a 11.40 mm drill available for the 75 percent thread engagement. Confirm the right-hand thread direction matches the application and that your tap holder accommodates the straight-flute shank before ordering.
Highlights
- Cuts precise 1/2"-20 UNF threads with straight-flute design
- Plug chamfer starts threads easily in through-holes
- High-speed steel body resists wear during hand tapping
- 38 in overall length gives good leverage and control
- 66 in thread length matches standard depth requirements
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
Does the 1.66 in thread length on this Cleveland tap generate enough heat to require cutting fluid during extended use?
The 1.66 in thread length on this high-speed steel tap will produce heat during prolonged cutting; using a suitable cutting fluid is recommended to manage temperature and extend tool life.
What size drill bit must I already own to prepare the hole for this 1/2"-20 UNF tap?
You need a 11.40 mm drill bit to create the 75 percent thread hole before using this 1/2"-20 UNF plug tap.
Will the H5 thread limit and 2B class of fit on this tap match the threads on my older UNF fasteners?
Yes, the H5 limit and 2B class of fit are standard for unified fine threads, so this tap will cut threads compatible with existing 1/2"-20 UNF hardware.
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