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NPT and BSPT Fixed Male and NPT Fixed Female Fittings |
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End Fitting Specification
- NPT Taper Threads to American National Standard Pipe Taper Thread design to ANSI B2.1
- 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
Alternatives- Fittings in Zinc Plated Carbon Steel
Fixed Male NPT or BSPT
 
| Nominal Hose Size |
NPT or BSPT Thread Size |
*Fitting Length A
(Bioflex RC) |
Fitting Inside
Diameter I |
| in |
mm |
in |
in |
mm |
in |
mm |
| 1/2 |
13 |
1/2 |
3.30 |
84 |
0.38 |
9.53 |
| 3/4 |
20 |
3/4 |
3.74 |
95 |
0.63 |
15.88 |
| 1 |
25 |
1 |
4.13 |
105 |
0.80 |
20.24 |
| 1 1/4 |
32 |
1 1/4 |
4.90 |
124 |
1.00 |
25.40 |
| 1 1/2 |
40 |
1 1/2 |
5.19 |
132 |
1.25 |
31.75 |
| 2 |
50 |
2 |
5.78 |
142 |
1.75 |
44.45 |
Fixed Female NPT
 
| Nominal Hose Size |
NPT Thread Size |
*Fitting Length A
(Bioflex RC) |
Fitting Inside
Diameter I |
| in |
mm |
in |
in |
mm |
in |
mm |
| 1/2 |
13 |
1/2 |
3.42 |
87 |
0.38 |
9.53 |
| 3/4 |
20 |
3/4 |
3.66 |
93 |
0.63 |
15.88 |
| 1 |
25 |
1 |
4.13 |
105 |
0.80 |
20.24 |
| 1 1/2 |
40 |
1 1/2 |
4.80 |
122 |
1.25 |
31.75 |
| 2 |
50 |
2 |
4.96 |
126 |
1.75 |
44.45 |
*Fitting lengths listed are for Bioflex RC, SI and FP Grades. Shorter lengths apply for other grades of Bioflex.
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