Cleveland
Cleveland C86118 Spiral Point Tap 3/8-16 UNC Cobalt TiAlN 3 Flutes
A cobalt spiral-point tap cuts 3/8-16 UNC threads with three flutes and a TiAlN coating for longer tool life
- Spiral-point design drives chips forward for smoother 3/8-16 UNC threading
- Cobalt construction with TiAlN coating resists wear in tough materials
- Three flutes balance chip clearance and cutting strength
- Right-hand 2B class of fit meets standard thread requirements
- 75 % thread drill size 0.3125 in simplifies hole preparation
Cleveland C86118 Spiral Point Tap
The Cleveland C86118 is a spiral-point tap designed for creating UNC threads in through-hole applications. It suits machinists and maintenance technicians who need reliable thread cutting in steel or stainless materials. The cobalt substrate with TiAlN coating provides wear resistance for repeated use. Right-hand cutting action matches standard threading requirements.
3/8-16 UNC capacity with 75 percent thread drill
This tap cuts 3/8 inch 16 UNC threads using a 0.3125 inch drill size for 75 percent thread engagement. The 1 47/64 inch thread length and 3 15/16 inch overall length suit standard through-hole depths. Three flutes evacuate chips ahead of the cut to reduce binding. Class 2B fit meets general-purpose thread tolerances.
Cobalt TiAlN coating for tool life
The cobalt base material combined with TiAlN coating extends service life in abrasive or high-temperature cutting conditions. This specification determines whether the tap withstands the workpiece hardness and production volume intended. Uncoated or HSS alternatives will wear faster under the same loads. Choose based on material difficulty and batch size.
Highlights
- Spiral-point design drives chips forward for smoother 3/8-16 UNC threading
- Cobalt construction with TiAlN coating resists wear in tough materials
- Three flutes balance chip clearance and cutting strength
- Right-hand 2B class of fit meets standard thread requirements
- 75 % thread drill size 0.3125 in simplifies hole preparation
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
Will the 3/8-16 UNC thread cut cleanly into my existing cobalt drilled holes?
The tap matches a 3/8-16 UNC thread with a 75 percent thread drill size of 0.3125 in, so it is designed for holes drilled to that diameter.
How can I verify the tap is cutting correctly once I start threading?
A proper cut shows continuous chips exiting forward through the spiral point flutes and a thread gauge confirming a 2B class of fit.
Does the Cleveland C86118 come with a drill bit or handle, or must I supply them?
The package contains only the spiral point tap; a 0.3125 in drill bit and a tap wrench or holder are not included.
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