TAP 5/16" BSW TAPER HSS
TAP-5/16T-BSW
Imperial Taps
Description
Product Code : TAP-5/16T-BSW
Description: 5/16" BSW Taper Tap
Number Pieces : 1
Brand : Bordo
Specs :
Surface Finish: Bright
Material: HSS - Ground Thread
Flute Type: Straight
Diameter: 5/16"
TPI: 18
Overall Length: 72mm
Tapping Drill: 6.50mm
Type: Taper
Notes :
BSW (British Standard Whitworth)
This thread form was developed by Sir Joseph Whitworth in 1841. The thread form has rounded roots and crests and is specified in BS84:1956. The thread angle for BSW is 55 degrees and opposed to 60 degrees in Metric and Unified threads.
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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