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© 2004 Alamo Group Inc.
MAINTENANCE
MAINTENANCE
F-3778-12-04 Maintenance Section 5-7
GENERAL TORQUE SPECIFICATIONS
USE THE FOLLOWING TORQUES WHEN SPECIAL TORQUES ARE NOT GIVEN
AMERICAN STANDARD CAP SCREWS METRIC CAP SCREWS
SAE
Cap
Grade
Size
Inches MIN MINMINMINMINMAX MAXMAXMAXMAXMIN MAX MIN MINMAX MAX
FT-LBSFT-LBS N·mFT-LBS N·mN·m FT-LBS N·m Size
Millimeters
1/4-20 6.25 129867.25 15111188.5 10 8.25 119.5 13 M6 x 1.00
1/4-28 8 312321.5169 36.527272011 12 10.5 1412 16 M8 x 1.25
5/16-18 14 5742392915 7052473519 20 18.5 2520 27 M10 x 1.50
5/16-24 17.5 10275705219 12391846223 26 23 3125 34 M12 x 1.75
3/8-16 26 1631201158528 19814613910335 38 35 47.537 50 M14 x 2.00
3/8-24 31 23817617613034 29321621415842 46 41 55.545 61 M16 x 2.50
7/16-14 41 32524023317245 39829428421055.5 61 55 74.560 81 M18 x 2.50
7/16-20 51 46534333524755 57742640830169 74.5 68 9275 102 M20 x 2.50
1/2-13 65 63947245033272 78057654740488 97.5 86 11696 130 M22 x 2.50
1/2-20 76 81259957342384 992732700517103 114 102 138112 152 M24 x 3.00
9/16-12 95 1217898863637105 148810981055779129 142 127 172140 190 M27 x 3.00
9/16-18 111 165812241181872123 2027149614441066150 167 148 200164 222
5/8-11 126 139 171 188 168 228185 251
5/8-18 152 168 206 228 203 275224 304
3/4-10 238 262 322 355 318 431350 474
3/4-16 274 305 371 409 365 495402 544
7/8-9 350 386 474 523 466 631515 698
7/8-14 407 448 551 607 543 736597 809
1-8 537 592 728 802 716 970790 1070
1-14 670 740 908 1003 894 1211987 1337
M30 x 3.00
10.98.8Metric Class
Screw
Cap Screw
Typical
Grade ID
Markings
on Head
Typical
Grade ID
Markings
on Head
85
TORQUE TORQUETORQUETORQUE
NOTE: These values apply to fasteners as
received from supplier, dry or when lubricated
with normal engine oil. They do not apply if
special graphite or molydisulphide greases or
other extreme pressure lubricants are used.
Torque Specifications for
37° JIC Fittings
Torque Specifications for
SAE O-Ring Fittings
Size
-4 140 ± 10 12 ± 1 2 27/16-20
-5 180 ± 15 15 ± 1 2 21/2-20
-6 250 ± 15 21 ± 1 1 1/2 1 1/49/16-18
-8 550 ± 25 45 ± 5 1 1/2 13/4-16
-12 1000 ± 50 85 ± 5 1 1/4 11 1/16-12
-16 1450 ± 50 120 ± 5 1 11 5/16-12
-20 2000 ± 100 170 ± 10 1 11 5/8-12
-24 2400 ± 150 200 ± 15 1 11 7/8-12
-32 3200 ± 200 270 ± 20 1 12 1/2-12
in.·lb.
Assembly Torque
ft.·lb.
Tube
Connection
F.F.F.T
Thread
Size
Swivel Nut
or Hose
Connection
F.F.F.T
Assembly Torque
Size
2 5/16-24 90 ± 5 7.5 ± 0.5 1 ± .25
3 3/8-24 170 ± 10 14 ± 1 1 ± .25
4 7/16-20 220 ± 15 18 ± 1 1 ± .25
5 1/2-20 260 ± 15 22 ± 1 1 ± .25
6 9/16-18 320 ± 20 27 ± 2 1.5 ± .25
8 3/4-16 570 ± 25 48 ± 2 1.5 ± .25
10 7/8-14 1060 ± 50 90 ± 5 1.5 ± .25
12 1 1/16-12 1300 ± 50 110 ± 5 1.5 ± .25
14 1 3/16-12 1750 ± 75 145 ± 6 1.5 ± .25
16 1 5/16-12 1920 ± 125 160 ± 6 1.5 ± .25
20 1 5/8-12 2700 ± 150 225 ± 12 1.5 ± .25
24 1 7/8-12 3000 ± 150 250 ± 12 1.5 ± .25
32 2 1/2-12 3900 ± 200 325 ± 15 1.5 ± .25
F.F.F.T.in.·lb. ft.·lb.
Swivel Nut
or Hose
O-Ring Face Seal Hose/
Tube Swivel Nut
Swivel Nut
Torque
Swivel
Nut Hex
Size
(in.)
Thread
Size
(in.)
Dash
Size
-3
-4
-5
-6
-8
-10
-12
-14
-16
-20
-24
-32
5
6
8
10
12
16
20
22
25
32
38
50.8
--
9/16 - 18
--
11/16 - 16
13/16 - 16
1 - 14
1-3/16 - 12
1-3/16 - 12
1-7/16 - 12
1-11/16 - 12
2 - 12
--
--
11/16
--
13/16
15/16
1-1/8
1-3/8
--
1-5/8
1-7/8
2-1/4
--
--
16
--
24
50
69
102
102
142
190
217
--
--
N·mlb
f
·ft
12
--
18
37
51
75
75
105
140
160
--
Metric
Tube
O.D.
(mm)