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Cobalt spiral-point tap, black oxide finish, three flutes

Westward

Westward Spiral Point Tap 1/2-13 UNC 3 Flutes Cobalt

SKU CH-HV4T-HQ4Y9

Cuts 1/2-13 UNC threads in hard metals using cobalt steel with three flutes for efficient chip ejection

  • Cobalt construction resists wear in tough alloys
  • Spiral-point design pushes chips ahead of the cut
  • Three flutes balance strength and chip clearance
  • 1/2-13 UNC thread fits standard coarse fasteners
  • H3 limit with 3B class ensures precise fit

Westward Spiral Point Tap 1/2-13 UNC

This Westward Spiral Point Tap cuts internal threads in through-holes. It suits machinists and maintenance technicians who need reliable thread production. The cobalt construction resists wear when tapping tougher alloys. The spiral point design pushes chips forward for cleaner results.

Cobalt H3 thread limit for 3B class fit

The H3 thread limit matches a 3B class of fit for precise UNC threads. Cobalt material handles higher cutting temperatures than standard high-speed steel. Black oxide finish adds lubricity and corrosion resistance. Right-hand threads follow standard convention.

Suits through-hole tapping in steel and stainless

Buyers who need bottoming taps for blind holes should look at a different style. The plug chamfer requires enough hole depth for the thread length. Shops without rigid tapping holders may prefer a different geometry. The 3-flute layout balances strength and chip clearance.

How it compares

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

Price $17.99
Cheaper than about 68% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

How deep can the 1/2-13 UNC tap cut threads in one pass?

The thread length is 1 21/32 in so the tap will cut usable threads to that depth before the shank contacts the workpiece.

What does the H3 thread limit mean for the finished hole?

H3 allows a slightly larger pitch diameter than the basic 3B class so the internal threads will accept a standard 1/2-13 bolt with normal fit clearance.

What size tap wrench or holder fits the 3 3/8 in overall length tap?

Use a standard tap wrench that accommodates the 3 3/8 in overall length and the square on the shank; the cobalt body and black oxide finish do not change the holding dimensions.

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