#8-32 UNC tap-8-32 UNC thread tap-HSS bottom lead tap

#8-32 UNC tap

#8-32 UNC tap supplier-bottom and taper

8-32 UNC 2B / 3B bottom lead thread tap in HSS

  • Type: UN Tap
  • Size: 4.166 mm
  • Pitch: 0.794
  • Material: HSS (High speed steel)
  • Ground thread

# 8-32 UNC left hand thread tap also available (RH=right hand LH= left hand), if need right hand thread tap, no need specially specified, if need left hand tap, it should be specified specially.

8-32 UNC tap

Size d P L l l1 d1 C l2 Groove No.
# 8-32 UNC 4.166 0.794 53 16.5 21 4.5 3.55 6 3


  •  These American Standard taps usually produced according to class of fit: 2B, we also can produce according to 1B or 3B fully according to clients’ requirements.
  • Usually the 8-32 UNC thread taps are bright without special coating,  if clients need, we also can add special coatings, for example: TiN, TiCN, CrN or TiAlN. After coating, the taps’s working life can be improved greatly.
  • Usually these taps supplied by individual ( single bottoming tap), we also can send by sets ( Taper and bottom)
  • After Quenching treatment, the taps have a good wear – resistance.
  • Our tap’ cutting effect is good with sharp cutting performance
  • Good surface finish
  • outstanding quality, high precision and excellent production reliability.
  • Our taps can be used in through holes and blind holes.

We can supply straight-flute taps, spiral-flute taps, spiral-point taps and thread forming taps etc.

#8-32 UNC straight flute tap




Straight-flute taps 

Straight-flute taps are the most commonly used tools for cutting internal thread. it is suited to be used in short holes   for rough material and brittle material’s thread holes.

8-32 UNC spiral flute taps




Spiral-flute taps 

Spiral-flute taps can effectively control discharge of chip, which have great advantage in cutting stainless steel etc material which is hard to machined.  often used in blind holes.

# 8-32 UNC spiral point taps




Spiral-point taps 

Spiral-point taps are interior thread cutting tools which push chips through holes ahead of the tool. it is suited to tapping high accuracy thread. often used in through holes.

8-32 UNC thread forming taps




Thread forming taps 

Thread forming taps are suited in cold-forming no chips processing crafts. press rather than cut to create threads        in a hole, no chips are created. these taps are widely used in aluminum alloy, brass etc material, mostly suited in          machining small holes’ thread within 6 MM.

About us

gaugestools is a professional supplier of thread taps, we can supply rich ranges of thread taps, including Metric taps, UN taps, ACME taps, BSPP taps, BSPT taps, NPT taps, and Trapezoidal taps etc.

Worldwide shipment , usually taking 3-4 days clients can receive goods. Our Unified thread taps are popular in America and Europe etc. 

Check the full range of  UN thread taps 


ASME B 94.9


We accept payment of T/T(bank transfer), Paypal, Credit Cards, and West Union etc.

#8-32 UNC thread tap quality# 8-32 UNC thread tap delivery