2-5
Hydraulic Fitting Torque Specifications
Table 2-2: Hydraulic Fitting Torque Specifications
TORQUE IS SPECIFIED IN FOOT POUNDS- 37
o
JIC, ORS, & ORB (REV. 10/97)
This chart provides tightening torques for general purpose applications when special torques are not specified on
process or drawing. Assembly torques apply to plated nuts and capscrews assembled without supplemental lubrication
(as received condition). They do not apply if special graphite moly-disulfide or other extreme pressure lubricants are
used. When fasteners are dry (solvent cleaned) add 33% to as received condition torque. Bolt head identification marks
indicate grade and may vary from manufacturer to manufacturer. Thick nuts must be used on grade 8 capscrews. Use
value in [ ] if using prevailing torque nuts.
Parker Brand Fittings
Dash Size
37 Degree JIC
O-Ring (ORS)
O-Ring Boss (ORB)
-4
11-13
15-17
13-15
-5
14-16
---------------
21-23
-6
20-22
34-36
25-29
-8
43-47
58-62
40-44
-10
55-65
100-110
58-62
-12
80-90
134-146
75-85
-16
115-125
202-218
109-121
-20
160-180
248-272
213-237
-24
185-215
303-327
238-262
-32
250-290
--------------
310-340
Gates Brand Fittings
Dash Size
37 Degree JIC
O-Ring (ORS)
O-Ring Boss (ORB)
-4
10-11
10-12
14-16
-5
13-15
---------------
---------------
-6
17-19
18-20
24-26
-8
34-38
32-40
37-44
-10
50-56
46-56
50-60
-12
70-78
65-80
75-83
-14
--------------
65-80
--------------
-16
94-104
92-105
111-125
-20
124-138
125-140
133-152
-24
156-173
150-180
156-184
-32
219-243
--------------
--------------
Aeroquip Brand Fittings
Dash Size
37 Degree JIC
O-Ring (ORS)
O-Ring Boss (ORB)
-4
11-12
10-12
14-16
-5
15-16
---------------
16-20
-6
18-20
18-20
24-26
-8
38-42
32-35
50-60
-10
57-62
46-50
75-80
-12
79-87
65-70
125-135
-14
--------------
--------------
160-180
-16
108-113
92-100
200-220
-20
127-133
125-140
210-280
-24
158-167
150-165
270-360
-32
245-258
--------------
--------------
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