NPT & BSPT fittings

End Fitting Specifications

  • NPT Taper Threads to American National Standard Pipe Taper Thread design to ANSI/AMSE B1.20.1.
  • BSPT Threads to British Standard Pipe Taper Thread design to BS21

Alternatives - Parallel Threads, Metric Threads and Others.

End Fitting Materials

  • Fittings in Grade 316L SS
  • Ferrules, most in Grade 304 SS, some sizes in Grade 316L SS
  • Available in other materials to special order

Alternatives - Hydraulic design BSPT Male Fittings in Zinc Plated Carbon Steel, to special order.

Surface Finish:

  • All surface finishes are to ASME BPE-SF-O (No finish required).
  • If a specified finish on a particular surface is required, please state on the enquiry and order.


Fixed Male NPT or BSPT

Nominal
Hose Size
NPT or BSPT
Thread Size
*Fitting Length A
(Bioflex Ultra RC) 
Fitting Inside
Diameter I
Weight of Fitting
in mm in in mm in mm kg lbs
1/2 13 1/2 3.30 84 0.38 9.53 0.10 0.22
3/4 20 3/4 3.74 95 0.63 15.88 0.18 0.40
1 25 1 4.13 105 0.80 20.24 0.29 0.64
11/4 32 11/4 4.90 124 1.00 25.40 0.45 0.99
11/2 40 11/2 5.19 132 1.25 31.75 0.60 1.32
2 50 2 5.78 142 1.75 44.45 0.84 1.85
**21/2 65 21/2 5.31 135 2.25 57.15 1.84 4.04
**3 80 3 5.39 137 2.63 66.70 2.49 5.47


Fixed Female NPT

Nominal Hose Size NPT Thread Size *Fitting Length A
(Bioflex Ultra RC)
Fitting Inside Diameter I Weight of Fitting
in mm in in mm in mm kg lbs
1/2 13 1/2 3.42 87 0.38 9.53 0.18 0.40
3/4 20 3/4 3.66 93 0.63 15.88 0.22 0.49
1 25 1 4.13 105 0.80 20.24 0.33 0.73
11/2 40 11/2 4.80 122 1.25 31.75 0.75 1.65
2 50 2 4.96 126 1.75 44.45 1.06 2.34

* Fitting Lengths listed are for Bioflex Ultra RC, SI and BK hose grades. Shorter lengths apply for other hose grades.

** 21/2" and 3" sizes are only available as Direct Crimp Fittings