INTRODUCTION
Steel hydraulic fittings
37° flare fitting
Tube outside diameter/Hose inside
diameter
mm
Inch
Thread Size
Nm
lb in/lb ft
6.4 mm
1/4 in
7/16-20 in
8 – 16 Nm
72 – 144 lb in
7.9 mm
5/16 in
1/2-20 in
11 – 22 Nm
96 – 192 lb in
9.5 mm
3/8 in
9/16-18 in
14 – 34 Nm
120 – 300 lb in
12.7 mm
1/2 in
3/4-16 in
20 – 57 Nm
180 – 504 lb in
15.9 mm
5/6 in
7/8-14 in
34 – 79 Nm
300 – 696 lb in
19.0 mm
3/4 in
1-1/16-12 in
54 – 108 Nm
40 – 80 lb ft
22.2 mm
7/8 in
1-3/16-12 in
81 – 135 Nm
60 – 100 lb ft
25.4 mm
1 in
1-5/16-12 in
102 – 158 Nm
75 – 117 lb ft
31.8 mm
1-1/4 in
1-5/8-12 in
169 – 223 Nm
125 – 165 lb ft
38.1 mm
1-1/2 in
1-7/8-12 in
285 – 338 Nm
210 – 250 lb ft
Straight threads with O-ring
Tube outside diameter/Hose inside
diameter
mm
Inch
Thread Size
Nm
lb in/lb ft
6.4 mm
1/4 in
7/16-20 in
16 – 26 Nm
144 – 228 lb in
7.9 mm
5/16 in
1/2-20 in
22 – 34 Nm
192 – 300 lb in
9.5 mm
3/8 in
9/16-18 in
34 – 54 Nm
300 – 480 lb in
12.7 mm
1/2 in
3/4-16 in
57 – 91 Nm
540 – 804 lb in
15.9 mm
5/6 in
7/8-14 in
79 – 124 Nm
58 – 92 lb ft
19.0 mm
3/4 in
1-1/16-12 in
108 – 174 Nm
80 – 128 lb ft
22.2 mm
7/8 in
1-3/16-12 in
136 – 216 Nm
100 – 160 lb ft
25.4 mm
1 in
1-5/16-12 in
159 – 253 Nm
117 – 187 lb ft
31.8 mm
1-1/4 in
1-5/8-12 in
224 – 357 Nm
165 – 264 lb ft
38.1 mm
1-1/2 in
1-7/8-12 in
339 – 542 Nm
250 – 400 lb ft
Split flange mounting bolts
Size
Nm
lb in/lb ft
5/16-18 in
20 – 27 Nm
180 – 240 lb in
3/8-16 in
27 – 34 Nm
240 – 300 lb in
7/16-14 in
47 – 61 Nm
420 – 540 lb in
1/2-13 in
74 – 88 Nm
55 – 65 lb ft
5/8-11 in
190 – 203 Nm
140 – 150 lb ft
O-Ring Face Seal End
Tube outside diameter
Nominal SAE
dash size
mm
Inch
Thread Size
Nm
lb in/lb ft
-4
6.4 mm
1/4 in
9/16-18 in
14 – 16 Nm
120 – 144 lb in
-6
9.5 mm
3/8 in
11/16-16 in
24 – 27 Nm
216 – 240 lb in
-8
12.7 mm
1/2 in
13/16-16 in
43 – 54 Nm
384 – 480 lb in
-10
15.9 mm
5/8 in
1-14 in
62 – 76 Nm
552 – 672 lb in
-12
19.0 mm
3/4 in
1-3/16-12 in
90 – 110 Nm
65 – 80 lb ft
-14
22.2 mm
7/8 in
1-3/16-12 in
90 – 110 Nm
65 – 80 lb ft
-16
25.41 mm
1.0 in
1-7/16-12 in
125 – 140 Nm
92 – 105 lb ft
-20
31.8 mm
1-1/4 in
1-11/16-12 in
170 – 190 Nm
125 – 140 lb ft
-24
38.1 mm
1-1/2 in
2-12 in
200 – 254 Nm
150 – 180 lb ft
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