Features:
  • BSW - British Standard Whitworth
  • These Left Hand taps have an angle of thread is 55 degrees as opposed to 60 degrees in Metric and Unified threads.
  • 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.
  • BOTTOMING TAPS have a lead of 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.
  • INTERMEDIATE TAPS have a lead of four threads and are used in most general purpose applications to cut a thread true to a pre-drilled pilot hole.
  • TAPER TAPS have a lead of eight threads and are used as a starting tap in difficult or high precision holes.
  • Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use.
Specifications:
Diameter5/16"
Pitch18 tpi
LeadingSet
Overall Length72 mm
Tapping Drill6.5 mm
SKU 3086-5/16TS
Barcode # 9326518005995
Brand Bordo
Shipping Weight 0.0200kg
Type tools

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