TABLE I. Dash numbers and size. 1/ 2/
Weight Max
Dash number
Thread
Thread
J
Tubing
M
Q
S
Brass
Corrosion
Brass
Corrosion
T
A
B
±.005
outside
Diameter
Reference
SAE AS5201
resistant
lbs
resistant
AND10089
Diameter
diameter
ANPT
steel
steel
2
C2
.125
.3125-32 UNEF-3A
.812
.125
.026
.51
.438
±.003
3
C3
.188
.3750-24 UNF-3A
.938
.161
.028
1/8-27
.406
4
C4
.250
.4375-20 UNF-3A
1.000
.562
.65
.038
.189
5
C5
.312
.5000-20 UNF-3A
1.062
.625
.72
.045
6
C6
.375
1/4 - 18
.6250-18 UNF-3A
1.312
.750
±.004
.281
.547
.87
.080
8
C8
.500
3/8 - 18
.7500-16 UNF-3A
1.500
.875
.406
.672
1.01
.125
10
C10
.625
1/2 - 14
.9375-14 NS-3
1.750
.938
.531
.844
1.09
.185
12
.750
1.1250-12 UNF-3A
1.250
1.30
.270
3/4 - 14
1.875
±.005
.719
1.047
16
1.000
1.5000-12 UNF-3A
1.750
2.02
TABLE I. Dash numbers and size Continued. 1/ 2/
Dash number
Weight Max
Thread
Tubing
Thread
J
S
M
Q
Brass
Corrosion
Brass
Corrosion
outside
T
A
B
±.127
SAE AS5201
Diameter
Reference
resistant
Kg
resistant
diameter
AND10089
Diameter
ANPT
steel
steel
2
C2
3.175
.3125-32 UNEF-3A
20.625
3.175
.012
12.954
11.125
±..0762
3
C3
4.775
.3750-24 UNF-3A
23.825
4.089
.013
1/8 - 27
10.312
4
C4
6.350
.4375-20 UNF-3A
25.400
14.275
16.510
.017
4.801
5
C5
7.925
.5000-20 UNF-3A
26.975
15.875
18.288
.020
6
C6
9.525
1/4 - 18
.6250-18 UNF-3A
33.325
19.050
7.137
13.894
22.098
.036
±.1016
8
C8
12.700
3/8 - 18
.7500-16 UNF-3A
38.100
22.225
10.312
17.069
25.654
.057
10
C10
15.875
1/2 - 14
.9375-14 NS-3
44.450
23.825
13.487
16.358
27.686
.084
12
19.050
1.1250-12 UNF-3A
31.750
33.020
.122
3/4 - 14
47.625
±.1270
18.263
26.594
16
25.400
1.5000-12 UNF-3A
44.450
51.308
1/ Dimensions are in inches
2/ Metric equivalents are given for information only.