TABLE I. Dash numbers and size. 1/ 2/
Dash number
H
Tubing
Thread
C
P
A
D
E
F
G
+.004
J
Q
Brass
Corrosion
outside
T
B
Diameter
K
L
Pitch
±.015
Reference
±.015
Dia.
Dia.
-.000
Diameter
Reference
resistant
diameter
MIL-S-7742
(dia.)
dia.
Dia.
steel
2
C2
.125
.3125-32 UNEF-3A
.279 +.004
.438
.375
.375
.344
.312
.375
.173
.281
.234
.43
-.000
3
C3
.188
.3750-24 UNF-3A
.330 +.006
.500
.438
.438
.406
.375
.438
.257
.328
.281
.51
-.000
4
C4
.250
.4375-20 UNF-3A
.385 +.005
.500
.562
.531
.250
.438
.500
.316
.375
.312
.65
-.000
.156
5
C5
.312
.5000-20 UNF-3A
.447 +.006
.531
.625
.594
.531
.594
.379
.406
.344
.72
-.000
.281
6
C6
.375
.6250-18 UNF-3A
.565 +.008
.562
.750
.719
.188
.625
.719
.473
.438
.375
.87
-.000
8
C8
.500
.7500-16 UNF-3A
.682 +.008
.688
.875
.844
.219
.344
.750
.875
.598
.531
.438
1.01
-.000
10
C10
.625
.9375-14 NS-3
.848 +.004
.8911
.812
1.062
1.062
.438
.938
1.062
.719
-.000
.625
.531
+.0036
1.23
-.0000
.250
12
.750
1.1250-12 UNF-3A
1.305 +.009
.875
1.250
1.250
.531
1.062
1.250
.863
.729
1.44
-.000
.625
16
1.000
1.5000-12 UNF-3A
1.410 +.009
1.000
1.750
1.688
.312
.562
1.5
1.750
1.140
.750
2.02
-.000
TABLE I. Dash numbers and size Continued. 1/ 2/
Dash number
H
P
Tubing
C
Thread
Q
+.102
J
D
E
F
G
A
Corrosion
K
L
Pitch
outside
B
Diameter
T
Reference
-.000
Diameter
Reference
±.381
Dia.
Dia.
±.381
Brass
resistant
dia.
diameter
(dia.)
MIL-S-7742
Dia.
steel
.3125-32
7.087 +.1016
2
C2
3.175
11.125
9.525
9.525
8.738
7.925
9.525
4.394
7.137
5.944
10.922
UNEF-3A
-.000
.3750-24
8.386 +.1524
3
C3
4.775
12.700
11.125
11.125
10.312
9.525
11.125
6.528
8.331
7.137
12.954
UNF-3A
-.000
.4375-20
9.779 +.127
4
C4
6.350
12.700
14.275
13.487
6.350
11.125
12.700
8.026
9.525
7.925
16.510
UNF-3A
-.000
3.962
.5000-20
11.354 +.1524
5
C5
7.925
13.487
15.875
15.088
13.487
15.088
9.627
10.312
8.738
18.288
UNF-3A
-.000
7.137
.6250-18
14.351 +.2032
6
C6
9.525
14.275
19.050
18.263
4.775
15.875
18.263
12.014
11.125
9.525
22.098
UNF-3A
-.000
.7500-16
17.323 +.2032
8
C8
12.700
17.475
22.225
21.438
5.563
8.738
19.050
22.225
15.189
13.487
11.125
25.654
UNF-3A
-.000
22.6339
.9375-14
21.539 +.1016
15.875
13.487
+.09144
31.242
10
C10
15.875
NS-3
20.625
26.975
26.975
11.125
23.825
26.975
18.263
-.000
-.0000
6.350
1.1250-12
33.147 +.2286
12
19.050
22.225
31.750
31.75
13.487
26.975
31.750
21.920
18.263
36.576
UNF-3A
-.000
15.875
1.5000-12
35.814 +.2286
25.400
44.450
42.875
7925
14.275
38.100
44.450
28.953
16
25.400
19.050
51.308
UNF-3A
-.000
1/ Dimensions are in inches
2/ Metric equivalents are given for information only.