7 - SPECIFICATIONS
7-4
Torque – Hydraulic Tubes and Fittings
Standard torque data for hydraulic tubes and fittings
The above torque figures are recommended for plain,
cadmium or zinc plated fittings, dry or wet installations and
swivel nuts either swagged or brazed. These torques are not
recommended for tubes 12.7 mm ( 0.5 in) OD and thicker with
wall thickness of 0.889 mm ( 0.035 in) or less. The torque
is specified for 0.889 mm ( 0.035 in) wall tubes on each
application individually.
Tube Nuts for 37° Flared Fittings
O-Ring Boss Plugs, Adjustable
Fitting Lock Nuts, Swivel JIC -
37 ° Seats
Size
Tubing OD
Thread Size
ft-lbs
Nm
ft-lbs
Nm
Inches
mm
Min
Max
Min
Max
Min
Max
Min
Max
4
1/4
6.4
7/16-20
9
12
12
16
6
10
8
14
5
5/16
7.9
1/2-20
12
15
16
20
10
15
14
20
6
3/8
9.5
9/16-18
21
24
29
33
15
20
20
27
8
1/2
12.7
3/4-18
35
40
47
54
25
30
34
41
10
5/8
15.9
7/8-14
53
58
72
79
35
40
47
54
12
3/4
19.1
1-1/6-12
77
82
104
111
60
70
81
95
14
7/8
22.2
1-3/16-12
90
100
122
136
70
80
95
109
16
1
25.4
1-5/16-12
110
120
149
163
80
90
108
122
20
1-1/4
31.8
1-5/8-12
140
150
190
204
95
115
129
156
24
1-1/2
38.1
1-7/8-12
160
175
217
237
120
140
163
190
32
2
50.8
2-1/2-12
225
240
305
325
250
300
339
407
Summary of Contents for Kwik-Till HSD2500
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