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Safety information | Danfoss
French and British connections
French & British connections
French connections
British connections
Millimetrique and GAZ series
British standard pipe(BSP)
This connection consists of
a common male and two
different females. The millimetric
series is used with whole number
This BSPT (tapered) connection
is similar to the NPT, except that
the thread pitches are different in
most sizes, and the thread form
and O.D.s are close but not the
same. Sealing is accomplished by
thread distortion. A thread sealant
is recommended.
The BSP (parallel) male is similar to
the NPSM male except the thread
pitches are different in most sizes.
The female swivel BSPP has a
tapered nose/Globeseal flareless
swivel which seals on the cone
seat of the male.
metric O.D. tubing and the GAZ
Series is used with fractional number metric O.D. pipe size tubing.
Millimetric and GAZ threads
Tubing
O.D.
“R” dim.
“Gaz”
pipe O.D.
R” dim.
mm
in
mm
6.0
0.24
-
8.0
10.0
12.0
14.0
15.0
16.0
18.0
22.0
25.0
28.0
30.0
32.0
35.0
38.0
40.0
45.0
0.32
0.39
0.47
0.55
0.59
0.63
0.71
0.87
0.98
1.10
1.18
1.25
1.38
1.50
1.57
1.77
-
-
322
Female
Thread
I.D. “B”
Metric
thread
Male Thread
O.D. “A”
mm
in
mm
in
-
M12 x 1.5
12.0
0.47
11.0
0.43
13.3
16.8
21.3
26.8
33.5
42.3
-
0.52
0.66
0.83
1.05
1.32
1.66
-
14.0
16.0
18.0
20.0
22.0
24.0
27.0
30.0
33.0
36.0
39.0
42.0
45.0
48.0
52.0
54.0
0.55
0.63
0.71
0.78
0.87
0.94
1.06
1.18
1.30
1.41
1.54
1.65
1.77
1.89
2.04
2.12
12.5
14.5
16.5
18.5
20.5
22.5
25.5
28.5
31.5
34.5
37.5
40.5
43.5
46.5
50.5
52.0
0.49
0.57
0.65
0.73
0.81
0.89
1.00
1.12
1.24
1.36
1.48
1.60
1.71
1.83
1.99
2.05
48.3
1.90
M14 x 1.5
M16 x 1.5
M18 x 1.5
M20 x 1.5
M22 x 1.5
M24 x 1.5
M27 x 1.5
M30 x 1.5
M33 x 1.5
M36 x 1.5
M39 x 1.5
M42 x 1.5
M45 x 1.5
M48 x 1.5
M52 x 1.5
M54 x
2.0
M58 x
2.0
58.0
2.28
55.0
2.16
in
BSPT/BSPP threads
Inch
size
Dash
size
mm
mm
1/8
1/4
3/8
1/2
5/8
3/4
1
1 1/4
1 1/2
2
02
04
06
08
10
12
16
20
24
32
Nominal
thread
size
1/8–28
1/4–19
3/8–19
1/2–14
5/8–14
3/4–14
1–11
1 1/4–11
1 1/2–11
2–11
Male thread
O.D. inch
Female thread
I.D. inch
fraction
decimal
fraction
decimal
3/8
33/64
21/32
13/16
7/8
1 1/32
1 5/16
1 21/32
1 7/8
2 11/32
0.38
0.52
0.65
0.82
0.88
1.04
1.30
1.65
1.88
2.35
11/32
15/32
19/32
3/4
13/16
31/32
1 7/32
1 9/16
1 25/32
2 1/4
0.35
0.47
0.60
0.75
0.80
0.97
1.22
1.56
1.79
2.26
*Frequently, the thread size is expressed as a fractional dimension preceded by the letter “G”
or the letter “R”. The “G” represents a parallel thread and the “R” indicates a tapered thread.
For example, BSPP 3/8–19 may be expressed as G 3/8, and BSPT 3/8–19 may be expressed
as R3/8.
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