Cleveland
Cleveland 57620 Spiral Point Tap 1/4-20 UNC 3 Flute
Creates UNC threads in through-holes with a 3-flute spiral point design
- Creates precise internal threads with 1/4-20 UNC spiral point design
- High-speed steel construction resists wear during repeated tapping operations
- Black oxide finish reduces friction and prevents corrosion on cutting edges
- Three-flute geometry clears chips efficiently for smoother thread formation
- Plug-style tap starts threads easily in through-holes and blind holes
Cleveland 57620 Spiral Point Tap
The Cleveland 57620 is a spiral point tap designed for cutting unified coarse threads in a range of materials. It suits machinists and maintenance technicians who need reliable thread creation for 1/4-20 fasteners.
High Speed Steel with Black Oxide Finish
The high speed steel construction provides hardness and wear resistance for repeated use. A black oxide coating adds lubricity and helps resist corrosion during operation. The spiral point geometry pushes chips ahead of the tap, reducing clogging in through-hole applications.
For Through-Hole Threading in General Materials
This tap suits users cutting 2B class threads in through holes where chip evacuation is a priority. It is not intended for blind holes where chips must be pulled upward, nor for materials requiring specialised substrate or coating technologies. Builders needing different thread limits or flute counts should select an alternative tool.
Highlights
- Creates precise internal threads with 1/4-20 UNC spiral point design
- High-speed steel construction resists wear during repeated tapping operations
- Black oxide finish reduces friction and prevents corrosion on cutting edges
- Three-flute geometry clears chips efficiently for smoother thread formation
- Plug-style tap starts threads easily in through-holes and blind holes
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
Will the H3 thread limit on this 1/4-20 tap need re-calibration after extended use?
The H3 limit is a fixed manufacturing tolerance; the tap itself cannot be re-calibrated, so once the cutting edges wear beyond that tolerance the tool must be replaced.
What stops me from threading deeper than the 1 inch thread length on this spiral-point tap?
The fluted thread portion is exactly 1 inch long; attempting to cut deeper engages the unfluted shank, which cannot clear chips and will bind or break.
How much heat builds up in the high-speed steel body when tapping 75 percent thread depth all day?
High-speed steel retains hardness at elevated temperature, but continuous 75 percent-depth cuts in steel generate enough heat to require cutting fluid or pauses to prevent premature edge wear.
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