We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Three silver metal taps with spiral flutes and square shanks

Greenfield Threading

Greenfield Threading 174539 3pc HSS Tap Set #6-40 UNF

SKU CH-PNQG-0MP1X

Three-piece HSS tap set for cutting #6-40 UNF threads in right-hand direction

  • High-speed steel construction resists wear during tapping
  • Titanium nitride coating extends tool life in tough materials
  • Three-piece set includes taper, plug and bottoming taps
  • UNF #6-40 thread standard matches fine-pitch applications
  • Right-hand thread direction suits standard fastening tasks

Threading Set for #6-40 UNF

This three-piece set supplies taper, plug and bottoming hand taps cut from high-speed steel with a TiN coating. It targets mechanics and machinists who need to create or repair internal threads in the #6-40 UNF size.

Verify Thread Size and Fit Class

Confirm the workpiece requires a #6-40 UNF thread with a 2B class of fit and right-hand direction. The taps have a thread length of 11/16 in and an overall length of 2 in, so the hole depth must accommodate that reach. Ensure the material is suited to high-speed steel cutting tools.

High-Speed Steel with TiN Coating

The HSS body and TiN surface resist wear during repetitive hand-tapping tasks. Three flutes on each tap improve chip evacuation and reduce binding. The set includes taper, plug and bottoming styles so you can start, continue and finish threads without changing tools.

How it compares

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

Price $19.99
Cheaper than about 64% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE

Questions about this item

What comes in the 174539 set and what must I supply myself?

The set includes three high-speed steel taps — taper, plug and bottoming — for #6-40 UNF threads with TiN coating. You provide the tap wrench, cutting fluid and the workpiece.

How do I choose between the taper, plug and bottoming taps in this #6-40 UNF set?

Start with the taper tap to begin the thread, switch to the plug tap for through holes or continued cutting, and finish with the bottoming tap to reach the bottom of a blind hole.

What does the #6-40 UNF 2B H2 spec mean when I cut threads in steel?

It produces a #6 diameter, 40 threads-per-inch Unified Fine thread with a class 2B fit and H2 pitch-diameter limit, giving a standard precision right-hand internal thread 11/16 in long.

More in Bits, Hole Saws & Accessory Kits

Similar items