SMC Networks KFG2-F Series Operation Manual page 9

Chamfer Dimension for Female Thread
Caution
(1) Chamfer dimension for female thread of the
connection thread
Confirming to ISO 16030 (air pressure fluid
dynamics – connection – ports and stud ends),
the chamfer dimensions shown below are
recommended. By chamfering as shown in the
following table, machining of threads is easier
and effective for burr prevention.
Connection female
Thread size
M5
10-32UNF
Rc1/8
Rc1/4
Rc3/8
Rc 1/2
NPT、NPTF1/8
NPT、NPTF1/4
NPT、NPTF3/8
NPT、NPTF1/2
G1/8
G1/4
G3/8
G1/2
Precautions for use with non-SMC
Caution
(1) When using the KFG2-F series with tubing
other than those from SMC, the products are
not subject to warranty.
Chamfer dimension øD
(Recommended value)
(mm)
5.1 to 5.4
5.0 to 5.3
10.2 to 10.4
13.6 to 13.8
17.1 to 17.3
21.4 to 21.6
10.5 to 10.7
14.1 to 14.3
17.4 to 17.6
21.7 to 21.9
10.2 to 10.6
13.6 to 14.0
17.1 to 17.5
21.4 to 21.8
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