Cleveland
Cleveland C55392 Spiral Point Tap 7/16-20 UNF H3
Spiral point tap cuts 7/16-20 UNF threads in high-speed steel with TiCN coating
- Precision threading in unified fine sizes
- High-speed steel with TiCN coating resists wear
- Spiral-point design pushes chips ahead of the tap
- Three-flute geometry balances strength and chip clearance
- H3 limit fits class 2B holes per spec
Cleveland C55392 Spiral Point Tap
The Cleveland C55392 is a spiral point tap designed for creating 7/16-20 UNF threads in through-hole applications. It suits machinists and maintenance technicians who need reliable thread cutting in steel and similar materials. The plug chamfer allows easier starting and alignment during hand or machine tapping operations.
High-speed steel body with TiCN coating
High-speed steel construction provides the hardness and wear resistance required for repeatable thread production. The TiCN coating further reduces friction and extends tool life when cutting ferrous alloys. A right-hand thread direction and three-flute design promote efficient chip evacuation ahead of the tap, reducing the risk of flute clogging and thread damage.
UNF thread standard with H3 limit
The tap conforms to the Unified National Fine standard with a class 2B fit and H3 thread limit, controlling the pitch diameter tolerance for consistent assembly. It requires a 9.95 mm drill size to achieve approximately 75 percent thread engagement. The overall length of 3 5/32 inches and thread length of 1 7/16 inches define the maximum reach for deep-hole tapping.
Highlights
- Precision threading in unified fine sizes
- High-speed steel with TiCN coating resists wear
- Spiral-point design pushes chips ahead of the tap
- Three-flute geometry balances strength and chip clearance
- H3 limit fits class 2B holes per spec
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
What thread standard does the 7/16-20 UNF tap follow?
It follows the Unified National Fine standard with a 2B class of fit and H3 thread limit.
What drill size is required for a 75 percent thread?
The recommended drill size is 9.95 mm for 75 percent thread engagement.
How do you start the tap correctly in the hole?
Align the tap squarely, apply steady pressure while turning clockwise, and use cutting fluid to prevent binding.
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