Hose Tail Connectors (Male/Female/Barbed):

  • 20mm (3/4ins) F BSP-20mm (3/4ins) Barbed
  • 20mm (3/4ins) F BSP-12mm (3/8ins) Barbed
  • 20mm (3/4ins) M BSP-16mm (1/2ins) Barbed
  • 16mm (1/2ins) M BSP-16mm (1/2ins) Barbed
  • 20mm (3/4ins) M BSP- 20mm (3/4ins) Barbed
  • 25mm (1ins) F BSP-25mm (1ins) Barbed
  • 20mm (3/4ins) F BSP – 16mm (1/2ins) Barbed

BSP sizes don’t match up with what you measure on the scale of a ruler, which can obviously cause some confusion. For example a 1/2″ BSP thread actually measures more like 3/4″ with a ruler. The size was originally based on the inside diameter, measured in inches, of a steel pipe for which the thread was intended. This is the source of the confusion, as people think the size refers to the outside diameter of the male thread.