Cleveland
Cleveland C27642 Straight Flute Tap 3/8"-16 Semi-Bottoming
Creates UNC 3/8"-16 threads with a semi-bottoming cobalt tap, 2.94 in overall length and 0.75 in thread length
- TypeTaps
- 3/8"-16 UNC thread fits standard coarse fasteners
- Semi-bottoming design threads close to blind-hole bottoms
- Cobalt construction with black oxide resists wear and heat
- 94" overall length reaches deeper holes
- H3 limit and 2B class ensure precise fit
Cleveland 3/8"-16 UNC Straight Flute Tap
This Cleveland C27642 straight flute tap cuts 3/8"-16 UNC threads in a single pass. The tool is made from cobalt steel with a black oxide and nitride surface treatment for wear resistance. Its semi-bottoming chamfer allows threading close to the bottom of a blind hole. Overall length is 2.94 inches with a 0.75 inch thread length.
Machinists needing a 3/8"-16 UNC thread in ferrous
The H3 thread limit and 2B class of fit suit general-purpose production and maintenance work where standard tolerance is required. The 75 percent thread drill size is 5/16 inch, a detail the machinist must verify before tapping. This tap is not for left-hand threads, pipe threads, or metric thread forms, and it does not suit applications needing a spiral-point or spiral-flute geometry for chip evacuation in deep holes.
Semi-bottoming chamfer for blind-hole threading
The semi-bottoming design is the single specification that determines whether this tap reaches the required depth in a blind hole without bottoming out. Buyers who need a taper or plug chamfer for through-holes, or a full-bottoming chamfer for maximum thread depth, should select a different tap style.
Highlights
- 3/8"-16 UNC thread fits standard coarse fasteners
- Semi-bottoming design threads close to blind-hole bottoms
- Cobalt construction with black oxide resists wear and heat
- 94" overall length reaches deeper holes
- H3 limit and 2B class ensure precise fit
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
What does the 3/8"-16 size mean when I use this tap in a real job?
It cuts a 3/8 inch diameter thread with 16 threads per inch, the standard UNC coarse pitch for that diameter.
How does the H3 thread limit affect what the tap actually produces?
H3 is a standard tolerance class that yields a class 2B fit when the hole is drilled to 5/16 inch.
What do I need to fit this 2.94 inch tap in my holder or machine?
The 2.94 inch overall length and 0.75 inch thread length fit standard tap holders and drill-press spindles for hand or machine tapping.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
