Datasheet

Proper tightening torque
[N·m]
Uni thread size
Approx. wrench tightening angle
after tightened by hand
[deg]
5 to 7
11 to 13
14 to 16
20 to 22
1/8
1/4
3/8
1/2
30 to 60
30 to 60
15 to 45
15 to 30
3 to 4
4 to 5
8 to 9
14 to 15
1/8
1/4
3/8
1/2
30 to 45
15 to 30
15 to 30
15 to 30
Proper tightening torque
[N·m]
Uni thread size
Approx. wrench tightening angle
after tightened by hand
[deg]
Connection Female Thread: Rc, NPT, NPTF
Connection Female Thread: G
Connection
thread size
3.1 to 3.4
5.1 to 5.4
5.0 to 5.3
M3
M5
10-32UNF
Chamfer dimension øD (Recommended value)
Rc NPT, NPTF
Connection
thread size
—
10.2 to 10.4
13.6 to 13.8
17.1 to 17.3
21.4 to 21.6
G
—
10.2 to 10.6
13.6 to 14.0
17.1 to 17.5
21.4 to 21.8
1/16
1/8
1/4
3/8
1/2
8.2 to 8.4
10.5 to 10.7
14.1 to 14.3
17.4 to 17.6
21.7 to 21.9
45°
Rz 12.5
øD
øD
45°
Chamfer dimension øD
(Recommended value)
[mm]
Fittings & Tubing
Precautions 4
Be sure to read this before handling.
Tightening the threaded portion of the connection thread
5. Uni Thread Fittings
1) First tighten by hand, then use a proper wrench, which could
be suitable for the hexagon across flats on the body to
tighten with the proper tightening torque shown below.
2) The gasket can be recycled up to 6 to 10 times. It can be
replaced easily when it has sustained damage. A broken
gasket can be removed by holding it and then turning it in the
same direction as loosening the thread. If gasket is difficult to
remove, cut it with nippers, etc. In such a case, use caution
not to scratch the seat face because the seat face of 45°
gasket of fitting is the sealing face.
Caution
Caution
1. Chamfer dimension for female thread of the
connection thread M3, M5, 10-32UNF
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.
∗
For Uni thread, Rz 12.5 is necessary for sealing at the chamfered part.
2. Chamfer dimension of R and NPT thread with
sealant, and Uni thread
Chamfer Dimension for Female Thread
Recommended
No good
Fig. 2 When using a tying band to bind the piping together
Straight line
Mounting
pitch A
Fig. 1 Recommended piping
Recommended Piping Conditions
1. When connecting piping to the One-touch fitting, use
pipe length with sufficient margin, in accordance
with the piping conditions shown in Fig. 1.
Also, when using a tying band, etc., to bind the piping together, make sure
that external force does not come to bear on the fitting. (See Fig. 2.)
Tubing size
Mounting pitch A
Unit: [mm]
Nylon tubing Soft nylon tubing Polyurethane tubing
—
44 or more
56 or more
67 or more
84 or more
89 or more
112 or more
140 or more
134 or more
168 or more
178 or more
224 or more
—
35 or more
44 or more
52 or more
66 or more
70 or more
88 or more
110 or more
105 or more
132 or more
140 or more
176 or more
13 or more
25 or more
26 or more
38 or more
39 or more
57 or more
52 or more
69 or more
69 or more
88 or more
93 or more
114 or more
Straight line
length
ø2
ø3.2, 1/8"
ø4, 5/32"
ø3/16"
ø6
ø1/4"
ø8, 5/16"
ø10
ø3/8"
ø12
ø1/2"
ø16
10 or more
16 or more
20 or more
24 or more
30 or more
32 or more
40 or more
50 or more
48 or more
60 or more
64 or more
80 or more
Design/Selection
Tubing
1. When using a tubing other than from SMC, be careful
of the tolerance of the tubing O.D. and tubing material.
1) Nylon tubing Within ±0.1 mm
2) Soft nylon tubing Within ±0.1 mm
3) Polyurethane tubing Within +0.15 mm, Within −0.2 mm
2. When using fittings other than those from SMC, be
certain to confirm that operating conditions are such
that no problems will arise.
Do not use the tubing which does not satisfy the specified tubing
O.D. accuracy, or if the tubing has a different I.D., material, hardness,
or surface roughness from those of SMC’s tubing. Please consult
SMC if there is anything unclear. It may cause difficulty in connecting
the tubing, leakage, disconnection of the tubing, or fitting damage.
When used with tubing other than those from SMC, due to their
properties, the products listed below are not subject to
warranty.
KQG2, KQB2, KFG2, KF, ø2M
78