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4. When hose ends or connectors are made of materials other than steel, different torque values may be required.
O RING BOSS END FITTING OR LOCK NUT
Nom. SAE Dash
Size
-6
-8
-10
-12
-16
37 DEGREE FLARE FITTING (STEEL HYDRAULIC FITTINGS)
Nom. SAE
Dash Size
-2
-3
-4
6.4 mm
-5
7.9 mm
-6
9.5 mm
-8
12.7 mm
-10
15.9 mm
-12
19.0 mm
-14
22.2 mm
-16
25.4 mm
-20
31.8 mm
-24
38.1 mm
37 DEGREE FITTINGS
TUBE NUTS FOR 37 DEGREE FLARED FITTINGS
Size
Tubing OD
mm
in.
4
6.4
1/4
5
7.9
5/16
6
9.5
3/8
8
12.7
1/2
10
15.9
5/8
12
19.1
3/4
14
22.2
7/8
16
25.4
1
20
31.8
1-1/4
These torques are not recommended for tubes of 12.7 mm (0.5 in) OD and larger with wall thickness of 0.89 mm
(0.035 in) or less. The torque is specified for 0.89 mm (0.035 in) wall tubes on each application individually. Before
installing and torquing 37° flared fittings, clean the face of the flare and threads with a cleaning solvent or Loctite®
brand cleaner, and apply hydraulic sealant Loctite® 569™ to the 37° flare and the threads. Install fitting, and torque
to specified torque, loosen fitting and re-torque to specifications.
Thread Size
9/16 - 18
3/4 - 16
7/8 - 14
1-1/16 - 12
1-5/16 - 12
Tube OD/Hose ID
1/4 inch
5/16 inch
3/8 inch
1/2 inch
5/8 inch
3/4 inch
7/8 inch
1.0 inch
1-1/4 inch
1-1/2 inch
TORQUE
Thread
Newton·
Size
Meters
Min.
7/16-20
12
1/2-20
16
9/16-18
29
47
3/4-16
7/8-14
72
1-1/
104
16-12
1-3/
122
16-12
1-5/
149
16-12
1-5/8-12 190
INTRODUCTION
Newton·meters
48 to 54
70 to 78
102 to 114
142 to 160
237 to 254
Thread Size
5/16 - 24
8 to 9
3/8 - 24
11 to 12
7/16 - 20
14 to 16
18 to 21
1/2 - 20
9/16 - 18
27 to 33
3/4 - 16
46 - 56
7/8 - 14
77 to 85
107 to 119
1-1/16 - 12
1-3/16 -12
127 to 140
1-5/16 - 12
131 to 156
1-5/8 - 12
197 to 223
1-7/8 - 12
312 to 338
Foot
Pounds
Max.
Min.
Max.
16
9
12
20
12
15
33
21
24
54
35
40
79
53
53
111
77
82
136
90
100
163
110
120
204
140
150
_84269847_ 16/04/2010
16
lb/in
432 to 480
612 to 684
Newton·meters
72 to 84
96 to 108
120 to 144
156 to 192
240 to 300
408 to 504
684 to 756
O RING BOSS PLUGS
ADJUSTABLE FITTING
LOCKNUTS,
SWIVEL JIC-37° SEATS
TORQUE
Newton·
Meters
Min.
Max.
8
14
14
20
20
27
34
41
47
54
81
95
95
109
108
122
129
158
lb/ft
75 to 84
105 to 117
175 to 187
lb/in
lb/ft
79 to 88
94 to 103
97 to 117
145 to 165
230 to 250
Foot
Pounds
Min.
Max.
6
10
10
15
15
20
25
30
35
40
60
70
70
80
80
90
95
115
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