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NORTH AMERICAN FITTINGS & FLOW CONTROL VALVE CATALOG
>
Release 8.6
NPTF/INCH Thread Assembly & Interchange
Thread Size
Minimum Torque Value
Maximum Torque
Value
Pro-Fit
®
Nm Ft-Lbs
Nm Ft-Lbs
1/8" *
1.0
0.7
10.0
7.4
1/4" *
4.0
2.9
20.0
14.8
3/8" *
5.0
3.7
20.0
14.8
1/2"
27.0
20.0
54.0
40.0
* Hybrid torque values for these thread sizes are equal to the torque values for conventional use (NPTF male to NPTF female).
Composite Fitting
with
Pro-Fit
®
Thread
(ex: P7524 04-04)
BSP Parallel
BSPP/G
PF-JIS
Parallel
Hybrid Use:
•When inch OD tube fittings require assembly in alternate BSP ports.
• Thread sizes 1/8”, 1/4”, and 3/8” interchange without concern for torque with Camozzi’s patented
Pro-Fit
®
Thread sealing system.
• For 1/2” threads, use caution, and consult hybrid torque specifications below.
BSP Tapered
BSPT/R
PT-JIS Tapered
NPSM
Female
Parallel
NPTF Female
NPT Female
Tapered
Nickel-Plated Brass
with
Pro-Fit
®
Thread
(ex: P6510 04-04)
Male Thread
NPTF Form
Male Thread
NPTF Form
Male Thread
NPTF
Nickel-Plated Brass
with Standard
NPTF Thread
(ex: 6510 04-04)
Caution
: Mating material and female ports may be too soft for high torque values.
Check material hardness to avoid stripping, galling or cross-threading.
This table is ONLY a guide for "hybrid" situations that require interchanging thread types to accommodate tubing requirements.
HYBRID USE
CONVENTIONAL USE
“Hybrid” Torque Specifications - ( Pro-Fit - NPTF Fittings assembled into female BSP ports)