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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
48 to 54
70 to 78
3/4 - 16
7/8 - 14
102 to 114
1-1/16 - 12
142 to 160
1-5/16 - 12
237 to 254
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.
12
7/16-20
1/2-20
16
9/16-18
29
3/4-16
47
72
7/8-14
1-1/
104
16-12
1-3/
122
16-12
1-5/
149
16-12
1-5/8-12 190
INTRODUCTION
Newton·meters
432 to 480
612 to 684
Thread Size
Newton·meters
5/16 - 24
8 to 9
3/8 - 24
11 to 12
14 to 16
7/16 - 20
1/2 - 20
18 to 21
9/16 - 18
27 to 33
3/4 - 16
46 - 56
77 to 85
7/8 - 14
1-1/16 - 12
107 to 119
1-3/16 -12
127 to 140
1-5/16 - 12
131 to 156
197 to 223
1-5/8 - 12
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
77
111
82
136
90
100
163
110
120
204
140
150
47881877 13/01/2016
21
lb/in
75 to 84
105 to 117
175 to 187
lb/in
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·
Foot
Meters
Pounds
Min.
Max.
Min.
8
14
6
14
20
10
20
27
15
34
41
25
47
54
35
81
95
60
95
109
70
108
122
80
129
158
95
lb/ft
lb/ft
79 to 88
94 to 103
97 to 117
145 to 165
230 to 250
Max.
10
15
20
30
40
70
80
90
115
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