Cleveland
Cleveland C54768 Straight Flute Hand Tap 9/16"-18 UNF HSS 4-Flute
Cuts 9/16"-18 UNF threads in steel using four-flute high-speed steel with a 3B class of fit
- TypeTaps
- Straight-flute design clears chips cleanly in through-holes
- Four flutes distribute cutting load for smoother threads
- High-speed steel resists wear during repeated hand-tapping
- UNF 9/16"-18 thread fits fine-pitch automotive fasteners
- H3 limit and 3B class deliver precise fit for critical assemblies
Cleveland C54768 Tap Application
The Cleveland C54768 is a straight flute hand tap designed for creating internal UNF threads in a 9/16"-18 size. It suits machinists and maintenance technicians who need to cut precise right-hand threads by hand or with a tapping head. The high speed steel construction provides the hardness required for general-purpose threading in steel and non-ferrous metals. This tool is not for buyers who need to tap larger diameters or different thread standards.
UNF Thread Standard Limits
The tap follows the UNF fine-pitch standard with an 18 threads-per-inch count and a Class 3B fit. A 75 percent thread engagement requires a 12.90 mm drill size before tapping. The H3 thread limit defines the tolerance zone for the finished thread. Users cannot apply this tap for coarse-thread UNC series or for left-hand thread requirements without a different tool.
High Speed Steel Build Quality
The bright, uncoated high speed steel body resists wear during manual threading operations. Four flutes provide chip clearance and cutting stability across the 1 21/32 inch thread length. The overall length of 3 19/32 inches offers sufficient reach for through-holes and deep blind holes. The straight flute geometry demands regular reversal to break chips and prevent binding in deep cuts.
Highlights
- Straight-flute design clears chips cleanly in through-holes
- Four flutes distribute cutting load for smoother threads
- High-speed steel resists wear during repeated hand-tapping
- UNF 9/16"-18 thread fits fine-pitch automotive fasteners
- H3 limit and 3B class deliver precise fit for critical assemblies
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
Which Cleveland straight-flute hand tap matches a 9/16"-18 UNF thread?
The C54768 is a 9/16"-18 UNF straight-flute hand tap in high-speed steel with four flutes and an H3 thread limit for a 3B class of fit.
What does the 12.90 mm drill size mean when I am tapping a hole?
Drill the hole to 12.90 mm to achieve roughly 75 percent thread engagement before running the tap through the 1 21/32 in thread length.
How does the UNF standard affect the threads this tap cuts?
UNF specifies a fine-pitch 18 threads per inch, right-hand thread direction, and the H3 limit keeps the finished threads within the 3B tolerance band.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
