Diagnostic Instrumentation
Thread Size Chart
| Dash Size |
Tube OD |
Pipe Thread |
O-ring Boss &
37° JIC Thread |
ORFS Thread |
45° SAE Thread |
Code 61 Flange |
Code 62 Flange |
| 02 |
1/8 |
1/8-27 |
5/16-24 |
– |
5/16-24 |
– |
– |
| 03 |
3/16 |
– |
3/8-24 |
– |
3/8-24 |
– |
– |
| 04 |
1/4 |
1/4-18 |
7/16-20 |
9/16-18 |
7/16-20 |
– |
– |
| 05 |
5/16 |
– |
1/2-20 |
– |
1/2-20 |
– |
– |
| 06 |
3/8 |
3/8-18 |
9/16-18 |
11/16-16 |
5/8-18 |
– |
– |
| 07 |
7/16 |
– |
– |
– |
11/16-16 |
– |
– |
| 08 |
1/2 |
1/2-14 |
3/4-16 |
13/16-16 |
3/4-16 |
1.19 |
1.25 |
| 10 |
5/8 |
– |
7/8-14 |
1-14 |
7/8-14 |
– |
– |
| 12 |
3/4 |
3/4-14 |
1 1/16-12 |
1 3/16-12 |
1 1/16-24 |
1.50 |
1.62 |
| 14 |
7/8 |
– |
1 3/16-12 |
– |
– |
– |
– |
| 16 |
1 |
1-11 1/2 |
1 5/16-12 |
1 7/16-12 |
– |
1.75 |
1.88 |
| 20 |
1 1/4 |
1 1/4-11 1/2 |
1 5/8-12 |
1 11/16-12 |
– |
2.00 |
2.12 |
| 24 |
1 1/2 |
1 1/2-11 1/2 |
1 7/8-12 |
2-12 |
– |
2.38 |
2.50 |
| 32 |
2 |
2-11 1/2 |
2 1/2-12 |
– |
– |
2.81 |
3.12 |
| Dash Size |
Metric Threads |
| 10 |
10×1.0 |
| 12 |
12×1.5 |
| 14 |
14×1.5 |
| 16 |
16×1.5 |
| 18 |
18×1.5 |
| 20 |
20×1.5 |
| 22 |
22×1.5 |
| 24 |
24×1.5 |
| 26 |
26×1.5 |
| 27 |
27×2.0 |
| 30 |
30×2.0 |
| 33 |
33×2.0 |
| 34 |
34×1.5 |
| 36 |
36×1.5 |
| 40 |
40×1.5 |
| 42 |
42×2.0 |
| 45 |
45×1.5 |
| 48 |
48×2.0 |
| 52 |
52×2.0 |
|
| Dash Size |
BSPP/BSPT Threads |
| 02 |
1/8-28 |
| 03 |
– |
| 04 |
1/4-19 |
| 05 |
– |
| 06 |
3/8-19 |
| 08 |
1/2-14 |
| 10 |
– |
| 12 |
3/4-14 |
| 14 |
– |
| 16 |
1-11 |
| 20 |
1 1/4-11 |
| 24 |
1 1/2-11 |
| 32 |
2-11 |
|
Torque Values: Why Wet Torque?
Wet torque is the practice of using hydraulic fluid to lubricate the threads and o-rings of the fittings before installation. Due to differences in materials, plating types, thickness, and thread quality of different components, the coefficient of friction varies greatly on any given assembly. Lubrication not only produces a more consistent coefficient of friction, it increases clamping force on sealing area with less torque on threads. Over tightening causes threads to yield, deform, and therefore lose their ability to maintain an adequate load or clamping force on the seating area. Extended operation and severe conditions cause further yielding which results in leaks. Failure to wet torque is to compromise consistency and quality for convenience. Use the lowest torque value from the chart when wet torquing.
Pipe Adapters (NPT)
| Dash Size |
Turns Past Finger Tight |
| 01 |
1.5-3.0 |
| 02 |
1.5-3.0 |
| 04 |
1.5-3.0 |
| 06 |
1.5-3.0 |
| 08 |
1.5-3.0 |
| 12 |
1.5-3.0 |
| 16 |
1.0-2.5 |
| 20 |
1.0-2.5 |
| 24 |
1.0-2.5 |
| 32 |
1.0-2.5 |
|
Pipe Swivel Adapters (NPT)
| Dash Size |
Torque Foot/Lbs |
| 02 |
13 |
| 04 |
20 |
| 06 |
25 |
| 08 |
47 |
| 12 |
84 |
| 16 |
129 |
| 20 |
152 |
| 24 |
152 |
| 32 |
300 |
|
O-Ring Boss Adapters (J514 & J1926/3)
| Dash Size |
Straight Torque Foot/Lbs |
Adjustable Torque Foot/Lbs |
| 02 |
6-7 |
6-8 |
| 03 |
6-9 |
6-8 |
| 04 |
9-15 |
8-10 |
| 05 |
14-19 |
9-12 |
| 06 |
18-24 |
12-16 |
| 08 |
27-43 |
20-30 |
| 10 |
36-48 |
30-36 |
| 12 |
65-75 |
44-54 |
| 14 |
75-99 |
53-70 |
| 16 |
85-123 |
59-80 |
| 20 |
115-161 |
75-100 |
| 24 |
125-170 |
105-125 |
| 32 |
180-240 |
140-180 |
O-Ring Boss Adapters (J1453 & J1926/2)
| Dash Size |
Straight Stud Torque Foot/Lbs |
Adjustable Stud Torque Foot/Lbs |
| 02 |
N/A |
N/A |
| 03 |
8-10 |
N/A |
| 04 |
14-16 |
11-13 |
| 05 |
18-20 |
14-16 |
| 06 |
24-26 |
18-21 |
| 08 |
40-60 |
28-38 |
| 10 |
55-80 |
44-60 |
| 12 |
95-135 |
65-95 |
| 14 |
105-190 |
75-125 |
| 16 |
120-220 |
85-150 |
| 20 |
160-280 |
115-170 |
| 24 |
175-360 |
125-225 |
JIC 37° Adapters
| Dash Size |
Torque Foot/Lbs |
| 02 |
6-7 |
| 03 |
6-9 |
| 04 |
9-12 |
| 05 |
14-15 |
| 06 |
18-20 |
| 08 |
27-39 |
| 10 |
36-63 |
| 12 |
65-88 |
| 14 |
75-103 |
| 16 |
85-113 |
| 20 |
115-133 |
| 24 |
175-360 |
| 32 |
190-258 |
|
ORFS Adapters
| Dash Size |
Torque Foot/Lbs |
| 04 |
10-12 |
| 06 |
18-20 |
| 08 |
32-35 |
| 10 |
45-50 |
| 12 |
65-70 |
| 16 |
92-100 |
| 20 |
125-140 |
| 24 |
150-165 |
|
Flange Adapters (Code 61 & 62)
| Dash Size |
Code 61 Torque Foot/Lbs |
Code 62 Torque Foot/Lbs |
| 08 |
15-19 |
15-19 |
| 12 |
20-29 |
25-33 |
| 16 |
27-35 |
41-50 |
| 20 |
35-46 |
62-75 |
| 24 |
46-58 |
116-133 |
| 32 |
53-67 |
200-217 |
| 40 |
80-91 |
– |
| 48 |
137-150 |
– |
| 56 |
116-133 |
– |
| 64 |
116-133 |
– |
| 80 |
116-133 |
– |
