Cle-Line
Cle-Line C00764 Straight Flute Hand Tap, Taper, #2-56 UNC
Cuts #2-56 UNC threads with a taper lead and .44 in thread length in 1.75 in overall length high-speed steel
- Taper design starts threads easily in new holes
- #2-56 UNC size fits precise small-thread applications
- High-speed steel construction resists wear during hand tapping
- 75 in overall length provides controlled leverage
- Bright uncoated finish suits general-purpose threading work
Cle-Line C00764 Tap for #2-56 UNC Threads
This straight flute hand tap cuts internal threads in a #2-56 UNC size with a taper lead for easy starting. It is made from high speed steel with a bright uncoated finish and a right-hand thread direction. The thread limit is H2 and the class of fit is 2B. Machinists and maintenance technicians use it for general-purpose threading in steel and non-ferrous metals.
Taper Lead and 75 Percent Thread Drill Size
The taper chamfer distributes cutting load across several teeth so the tap starts straight in a pre-drilled hole. A 75 percent thread drill size of 1.73 mm prepares the correct minor diameter for a strong 2B fit. The high speed steel body resists wear during hand or powered tapping operations. Bright finish prevents coating buildup in soft materials.
Practical Limits of a Straight Flute Taper Tap
Chip evacuation relies on manual reversal because the straight flutes do not pull swarf forward. The short thread length of 0.44 in and overall length of 1.75 in restrict use to through holes or blind holes with adequate clearance. It is not suited for deep holes, high-volume production or materials that require spiral point or spiral flute geometry. Buyers who need automated chip removal or bottoming capability should select a different tap style.
Highlights
- Taper design starts threads easily in new holes
- #2-56 UNC size fits precise small-thread applications
- High-speed steel construction resists wear during hand tapping
- 75 in overall length provides controlled leverage
- Bright uncoated finish suits general-purpose threading work
Specifications
| Brand | CLE-LINE |
|---|
Questions about this item
Will the #2-56 UNC tap need replacement once the H2 thread limit wears beyond the 2B class of fit?
The H2 limit and 2B class of fit define the tolerance window; the high-speed steel tap should be replaced when thread gauging shows it no longer holds that window.
What limit appears first during sustained tapping of #2-56 UNC threads with the 0.44 in thread length?
Chip packing in the 0.44 in straight flutes typically becomes the limiting factor before the high-speed steel cutting edges dull.
How much heat builds up in the 1.75 in high-speed steel body when running the tap all day in a 1.73 mm drill hole?
The short 1.75 in length and uncooted bright finish dissipate heat quickly, so temperature rise stays low with proper cutting fluid and regular chip clearing.
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