TAP 1.1/4" UNC TAPER HSS
TAP-1.1/4T-UNC
Imperial Taps
Description
Product Code : TAP-1.1/4T-UNC
Description: 1.1/4" UNC Taper Tap
Number Pieces : 1
Brand :Totem
Specs :
Surface Finish: Bright
Material: HSS - Ground Thread
Flute Type: Straight
Diameter: 1.1/4"
TPI: 7
Overall Length: 151mm
Tapping Drill: 28.00mm
Type: Taper
Notes :
UNC (Unified National Coarse)
This thread form was introduced in 1948 as an attempt to standardise thread forms in the USA, Canada, and the UK. The thread profile of UNC is the same as for metric threads and is described in the JIS B0206 standard. The thread is described by its major diameter and the number of threads per inch of length (TPI) This tread series is commonly used in the mass production of bolts, screws and nuts. It is used for threading into lower tensile strength materials (bronze, brass, aluminium and plastics) to obtains the best resistance to stripping of the internal thread. It is also used on quick assembly or if corrosion or slight damage is possible.
Taper Taps - have a lead up of up to eight threads and are used as a starting tap in difficult or high precision holes.
Intermediate Taps - have a lead up of about four threads and are used in most general purpose applications to cut a thread true for a pre-drilled pilot hole.
Bottoming Taps - have a lead up of about two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole. Bottoming taps are typically preceded by the use of a Taper or Intermediate tap.
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