NPT Pipe Straight, FNPT
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- High purity, chemical handling applications in the semiconductor industry
- Corrosive applications in the chemical industry
- Corrosive, high purity Laboratory applications
Specifications
Part Number | FNPT Size | Orifice | Dimension A | Dimension B | Hex |
FSU2 | 1/8" | 0.25" (6.4 mm) | 0.62" (15.9 mm) | 1.62" (41.1 mm) | 5/8" |
FSU4 | 1/4" | 0.35" (8.9 mm) | 0.75" (19.0 mm) | 1.62" (41.1 mm) | 3/4" |
FSU6 | 3/8" | 0.44" (11.2 mm) | 0.94" (23.9 mm) | 1.62" (41.1 mm) | 15/16" |
FSU8 | 1/2" | 0.56" (14.2 mm) | 1.12" (28.6 mm) | 1.62" (41.1 mm) | 1 1/8" |
FSU12 | 3/4" | 0.75" (19.0 mm) | 1.41" (35.9 mm) | 1.62" (41.1 mm) | 1 7/16" |
Pipe Thread (NPT) Assembly Procedure
- Apply PTFE tape or paste sealant to MNPT threads starting one thread back from end of fitting.
- When using tape, tightly wrap in direction of threads to conform tape to thread shape.
a. Use 3 1/2 to 4 wraps of tape when assembling PFA threads to PFA material.
b. Use 4 to 5 wraps of tape when assembling PFA threads to a material other than PFA. - Thread the fitting onto the mating component until hand tight.
- Using a wrench, tighten fitting about 4 turns past hand tight.
PTFE tape = 1/2" wide for all NPT fittings
Note: PTFE tape is not recommended for use in a gaseous application.
Torque (in•lbs x .11298 = newton•m)
In•lbs | Newton•m | |
1/16" | 5.0 | 0.57 |
1/8" | 7.0 | 0.79 |
1/4" | 16 | 1.81 |
3/8" | 23 | 2.60 |
1/2" | 30 | 3.39 |
3/4" | 54 | 6.10 |
1" | 78 | 8.81 |
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