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Cleveland spiral point tap 5/16-18 UNC three flutes TiAlN coating

Cleveland

Cleveland C86116 Spiral Point Tap 5/16-18 UNC 3 Flutes TiAlN

SKU CH-R6WR-V5N67

Creates 5/16-18 UNC threads with a TiAlN-coated cobalt spiral-point tap featuring three flutes and a plug chamfer

  • Spiral-point design pushes chips forward for cleaner through-holes
  • TiAlN coating on cobalt substrate resists wear at higher cutting speeds
  • 5/16"-18 UNC 2B class of fit meets standard thread requirements
  • Three-flute geometry balances chip clearance with thread strength
  • 1-3/8" thread length suits deeper tapping operations

Cleveland C86116 Spiral Point Tap

The Cleveland C86116 is a spiral point tap designed for creating UNC threads in through-hole applications. It suits machinists and maintenance technicians who need reliable thread production in steel and similar materials. The TiAlN coating enhances wear resistance during repetitive cutting cycles.

5/16-18 UNC capacity and limits

This tap cuts a 5/16-18 UNC thread with a 3 35/64 inch overall length and 1 3/8 inch thread length. The 75 percent thread drill size F and 2B class of fit provide standard engagement for general-purpose fastening. Three flutes and a plug chamfer push chips ahead of the cut, preventing clogging in through holes but limiting use in blind-hole work.

Upgrade from uncoated or two-flute taps

The TiAlN surface and cobalt substrate replace uncoated high-speed steel taps when tool life and heat resistance become priorities. The three-flute design improves chip evacuation over two-flute versions in medium-volume production. The jump is worth it when thread consistency and reduced tap breakage outweigh the higher initial cost.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 62% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

Will the 5/16-18 UNC thread fit the existing holes in my older fixture?

The tap cuts a standard 5/16-18 UNC thread with a Class 2B fit, matching legacy hardware built to the same specification.

How can I confirm the TiAlN coating is performing during the first few holes?

Expect reduced friction, gold-coloured chips evacuating ahead of the tap, and consistent thread quality without built-up edge on the cobalt flutes.

Does the package include the 75 percent thread drill size F bit needed before tapping?

Only the spiral-point tap is supplied; the F-size drill for 75 percent thread engagement must be purchased separately.

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