Brochure

24
ø
D
45°
Rz 12.5
Mounting
Do not use body A for applications involving continu-
ous rotation.
Body A and the fi tting section may be damaged.
13.
Warning
For R, NPT Thread (With sealant)
Tightening method
1. The proper tightening torques of the fittings are as shown in
the table below. As a guide, tighten by hand, then turn it two or
three turns with a wrench. Check the dimensions of each
product for the hexagon width across flats.
Chamfered area for female thread
By chamfering as shown in the table below, machining of threads
is easier and effective for burr prevention.
∗ For Uni thread, Rz 12.5 is necessary for sealing at
the chamfered part.
Connection thread
port size
Chamfered dimension øD (Recommended value)
Rc NPT, NPTF
1/8 10.2 to 10.4 10.5 to 10.7
1/4 13.6 to 13.8 14.1 to 14.3
3/8 17.1 to 17.3 17.4 to 17.6
1/2 21.4 to 21.6 21.7 to 21.9
Connection thread port size Proper tightening torque (N·m)
NPT, R1/8 3 to 5
NPT, R1/4 8 to 12
NPT, R3/8 15 to 20
NPT, R1/2 20 to 25
ø
D
45°
Body A
Body B
Caution
For M5, 10-32UNF
Tightening method
First, tighten it by hand, then give it an additional 1/6 turn to 1/4
turn with a wrench. A reference value for the tightening torque is
1 to 1.5 N·m.
Note) Excessive tightening may damage the thread portion or
deform the gasket and cause air leakage.
If the screw is too shallowly screwed in, it may come loose
or air may leak.
Chamfered area for female thread
1. Confirming to ISO 16030 (air pressure fluid dynamics – con-
nection – ports and stud ends), the chamfered dimensions
shown in the table below are recommended.
Female thread
port size
Chamfered dimension øD
(Recommended value)
M5 5.1 to 5.4
10-32UNF 5.0 to 5.3
Series AS-FS
Specifi c Product Precautions 2
Be sure to read this before handling. Refer to the back cover for Safety Instructions.
For Flow Control Equipment Precautions, refer to “Handling Precautions for SMC
Products” and the Operation Manual on SMC website, http://www.smcworld.com