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4300 Catalog
Assembly / Installation
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
T6
Tapered Thread Ports
Tapered thread ports include NPTF, BSPT and metric taper.The
tapered threads in these ports serve two functions: 1) to hold
the fitting in place while under pressure and 2) to serve as the
primary seal.The seal for NPTF threads is created by the metal-
to-metal contact between themating roots and crests of themale
and female threads. With all other tapered threads, there is not
always a contact at the roots and crests, but the spiral gap there
is small enough for a sealant to fill and provide a seal.
Fig. T8 – Tapered Thread Port
Port End Assembly
Metric (ISO Thread M) Port Assembly (ISO 9974-1 / DIN 3852-1)
Note:
Lubricate threads before assembly! Values in chart are for steel fittings in steel ports. For stainless steel fittings, please use the
upper limit of torque range. For brass (and other soft metals), decrease torque value by 35%.
Table T3 – Assembly Torques for ISO 9974-1 / DIN 3852-1 Port
Series
Tube
O.D.
Metric
Thread
M Size
Assembly Torque Nm +10% -0
Straight Male Stud Fittings
Non-Return
Valves
RHV / RHZ Banjo Fittings
Plugs
VSTI-ED
Straight and
Adjustable
Fittings
Form A
for Sealing
Washer
Form B
with Cutting
Face
Form E
with ED-
Sealing
Form E
with ED-
Sealing WH / TH SWVE
Form E
with ED-
Sealing
O-Ring with
Retaining
Ring
6 M 10 x 1
9
18
18
18
18
18
12
15
8 M 12 x 1.5
20
30
25
25
45
35
25
25
10 M 14 x 1.5
35
45
45
35
55
50
35
35
12 M 16 x 1.5
45
65
55
50
80
60
55
40
L
15 M 18 x 1.5
55
80
70
70
100 80
65
45
18 M 22 x 1.5
65
140
125
125
140 120
90
60
22 M 27 x 2
90
190
180
145
320 130 135
100
28 M 33 x 2
150
340
310
210
360
225
160
35 M 42 x 2
240
500
450
360
540
360
210
42 M 48 x 2
290
630
540
540
700
360
260
6 M 12 x 1.5
20
35
35
35
45
35
35
8 M 14 x 1.5
35
55
55
45
55
50
55
10 M 16 x 1.5
45
70
70
55
80
60
70
12 M 18 x 1.5
55
110
90
70
100 80
90
S
14 M 20 x 1.5
55
150
125
100
125 110
80
125
16 M 22 x 1.5
65
170
135
125
135 120
135
20 M 27 x 2
90
270
180
135
320 135
180
25 M 33 x 2
150
410
310
210
360
310
30 M 42 x 2
240
540
450
360
540
450
38 M 48 x 2
290
700
540
540
700
540
1) M30X2 will be added to ISO 6149 standards at next revision.
2) M38X2 is not covered in ISO 6149 standards.
3) These torques are for steel fittings, assembled lubricated, for brass (and
other soft metals), decrease torque value by 35%.
4) For cartridge valves only.
Table T4 – ISO 6149 / DIN 3852-3 Port Assembly Torques
Metric
Thread
M Size
Assembly Torque (+10% -0)
3)
ISO 6149-2 Stud Ends
(S-Series)
(Seal-Lok, EO &
VSTI-OR Plugs)
ISO 6149-3 Stud Ends
(L-Series)
(Triple-Lok, EO, Ferulok
& Pipe Adapters)
N.m.
ft. lbs.
N.m.
ft. lbs.
M8x1
10
7.5
8
6
M10x1
20
15
15
11
M12x1.5
35
26
25
18
M14x1.5
45
33
35
26
M16x1.5
55
41
40
30
M18x1.5
70
52
45
33
M20x1.5
4)
80
59
— —
M22x1.5
100
74
60
44
M27x2
170
125
100
74
M30x2
1)
235
175
130
95
M33x2
310
230
160
120
M38x2
2)
320
235
185
135
M42x2
330
245
210
155
M48x2
420
310
260
190
M60x2
500
370
315
230
Dimensions and pressures for reference only, subject to change.
Metric ISO Port Assembly
(ISO 6149/DIN 3852-3)