Cleveland
Cleveland 55320 Spiral Point Tap 5/16-18 UNC 2 Flute HSS TiN
Spiral point tap cuts 5/16-18 UNC threads in high-speed steel with TiN coating and two flutes
- TypeTaps
- Spiral-point geometry pushes chips forward for cleaner through-holes
- 5/16-18 UNC thread fits standard coarse-pitch fasteners
- High-speed steel with TiN coating resists wear and heat
- Two-flute design balances strength and chip clearance
- 75 % thread depth matches F drill size for reliable engagement
Cleveland 55320 Spiral Point Tap
The Cleveland 55320 is a spiral point tap built from high speed steel with a TiN coating. It produces a 5/16-18 UNC thread with a 2B class of fit using two straight flutes. The plug chamfer and right-hand cut push chips ahead of the cut in through-hole applications.
Suited for production through-holes in steel
Machinists who need chip evacuation forward through the workpiece will benefit from the spiral point geometry. The H3 thread limit and 75 percent thread drill size F suit standard 2B fit requirements. Buyers who need a bottoming tap for blind holes or a different thread form should look at another tool.
HSS substrate with TiN resists wear during
High speed steel provides the toughness needed for sustained tapping cycles in ferrous metals. The titanium nitride coating reduces friction and extends tool life when the tap is run at consistent speeds. Two flutes deliver adequate chip clearance for continuous operation without clogging in through-hole work.
Highlights
- Spiral-point geometry pushes chips forward for cleaner through-holes
- 5/16-18 UNC thread fits standard coarse-pitch fasteners
- High-speed steel with TiN coating resists wear and heat
- Two-flute design balances strength and chip clearance
- 75 % thread depth matches F drill size for reliable engagement
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
What tap drill size is required before using the 5/16-18 UNC spiral point tap?
The 75 percent thread drill size F is specified for this 5/16-18 UNC tap to prepare the correct hole diameter.
Can the H3 thread limit tap produce a 2B class of fit in existing UNC threads?
Yes, the H3 thread limit is designed to cut a 2B class of fit in unified coarse threads when used correctly.
How can I confirm the TiN coated tap is cutting properly after setup?
A properly cutting tap produces a continuous spiral chip flow forward and leaves a clean 2B class thread profile.
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