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Series 21 1/4" Threaded FEMALE Coupling

Series 21 1/4'' Threaded FEMALE Coupling
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Series 21
1/4" Threaded FEMALE Coupling

1/4" BSP Female Thread

Compatible with RECTUS INTEGRATED Series 21 Fittings
Nickel Plated Brass

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Code:  MBFCB
Brand:  WCW


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British Pipe Standard

The British Standard Pipe (BSP) is a family of standard screw thread types that has been adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread and has been adopted as a standard scale used in plumbing fittings, except in the United States where NPT is the standard used.

Measuring the Outside of the Male Thread:

  • 9.5mm (3/8") External Diameter — Male 1/8" BSP Thread
  • 13mm (1/2") External Diameter — Male 1/4" BSP Thread
  • 16mm External Diameter — Male 3/8" BSP Thread
  • 21mm (5/8") External Diameter — Male 1/2" BSP Thread
  • 26mm (1") External Diameter — Male 3/4" BSP Thread
  • 37mm External Diameter — Male 1" BSP Thread

Measuring the Inside of the Female Thread:

  • 8mm Internal Diameter — Female 1/8" BSP Thread
  • 11.5mm (3/8") Internal Diameter — Female 1/4" BSP Thread
  • 14mm Internal Diameter  — Female 3/8" BSP Thread
  • 19mm (3/4") Internal Diameter — Female 1/2" BSP Thread
  • 24.5mm (5/8") Internal Diameter — Female 3/4" BSP Thread
  • 31mm Internal Diameter — Female 1" BSP Thread

Threads are tapered to ensure a water tight seal so sizes are approximate

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