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Hydraulic Fitting Torque Specifications
TORQUE IS SPECIFIED IN FOOT POUNDS- 37
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.
Dash Size
-4
-5
-6
-8
-10
-12
-16
-20
-24
-32
Dash Size
-4
-5
-6
-8
-10
-12
-14
-16
-20
-24
-32
Dash Size
-4
-5
-6
-8
-10
-12
-14
-16
-20
-24
-32
2-8
TABLE OF CONTENTS
Parker Brand Fittings
37 Degree JIC
11-13
14-16
20-22
43-47
55-65
80-90
115-125
160-180
185-215
250-290
Gates Brand Fittings
37 Degree JIC
10-11
13-15
17-19
34-38
50-56
70-78
--------------
94-104
124-138
156-173
219-243
Aeroquip Brand Fittings
37 Degree JIC
11-12
15-16
18-20
38-42
57-62
79-87
--------------
108-113
127-133
158-167
245-258
Table 2-2: Hydraulic Fitting Torque Specifications
o
JIC, ORS, & ORB (REV. 10/97)
O-Ring (ORS)
15-17
---------------
34-36
58-62
100-110
134-146
202-218
248-272
303-327
--------------
O-Ring (ORS)
10-12
---------------
18-20
32-40
46-56
65-80
65-80
92-105
125-140
150-180
--------------
O-Ring (ORS)
10-12
---------------
18-20
32-35
46-50
65-70
--------------
92-100
125-140
150-165
--------------
O-Ring Boss (ORB)
13-15
21-23
25-29
40-44
58-62
75-85
109-121
213-237
238-262
310-340
O-Ring Boss (ORB)
14-16
---------------
24-26
37-44
50-60
75-83
--------------
111-125
133-152
156-184
--------------
O-Ring Boss (ORB)
14-16
16-20
24-26
50-60
75-80
125-135
160-180
200-220
210-280
270-360
--------------
F-725-0122
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