GENERAL INFORMATION - A-15
79019435B
TORQUE CHART FOR INCH FASTENERS (ZINC COATED)
Nominal
Size
Strength Class-
SAE 2 (plain head)
Strength Class-
SAE 5
Strength Class-
in Inches (SAE 8)
Torque Nm (lbf ft)
Torque Nm (lbf ft)
Torque Nm (lbf ft)
Min. Max. Min.
Max.
Min.
Max.
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-1/2
6.8 (5)
13.5 (10)
24 (18)
41 (30)
61 (45)
122 (90)
217 (160)
-
-
-
-
-
8.1 (6)
16.2 (12)
28 (21)
46 (34)
70 (52)
142 (105)
250 (185)
-
-
-
-
-
10.8 (8)
22 (16)
39 (29)
64 (47)
99 (73)
198 (146)
350 (258)
569 (420)
847 (625)
1051 (775)
1491 (1100)
2576 (1900)
15 (11)
30 (22)
53 (39)
85 (63)
131 (97)
263 (194)
464 (342)
759 (560)
1119 (825)
1390 (1025)
1966 (1450)
3390 (2500)
16.2 (12)
31 (23)
56 (41)
91 (67)
140 (103)
279 (206)
495 (365)
800 (590)
1200 (885)
1681 (1240)
2386 (1760)
4121 (3040)
21.7 (16)
42 (31)
75 (55)
121 (89)
185 (137)
371 (274)
658 (485)
1071 (790)
1580 (1165)
2224 (1640)
3159 (2330)
5437 (4010)
TORQUE CHART FOR METRIC FASTENERS (ZINC COATED)
Nominal
Size
Strength Class-
ISO 4.6 (4T)
Strength Class-
ISO 8.8 (7T)
Strength Class-
ISO 10.9 (9T)
in mm
Torque Nm (lbf ft)
Torque Nm (lbf ft)
Torque Nm (lbf ft)
Min. Max. Min.
Max.
Min.
Max.
M3
M4
M5
M6
M8
M10
M12
M16
M20
M24
M30
M36
0.5 (0.3)
1.2 (0.9)
2.2 (1.6)
4.0 (2.9)
9.5 (7.0)
19 (14)
33 (24)
84 (62)
160 (118)
280 (207)
540 (398)
950 (700)
0.7 (0.5)
1.6 (1.2)
3.0 (2.2)
5.0 (3.7)
12.5 (9.2)
25 (18)
43 (32)
110 (81)
210 (155)
360 (266)
720 (531)
1250 (922)
1.3 (0.9)
3.1 (2.3)
6.0 (4.4)
10 (7.4)
25 (18.4)
50 (37)
90 (66)
200 (148)
420 (310)
720 (531)
1400 (1033)
2500 (1844)
1.7 (1.3)
4.1 (3.0)
8.0 (5.9)
14 (10.3)
35 (26)
70 (52)
120 (89)
260 (192)
560 (413)
860 (634)
1800 (1328)
3300 (2434)
1.8 (1.3)
4.3 (3.2)
8.5 (6.3)
14 (10.3)
36 (26)
72 (53)
120 (89)
300 (221)
600 (443)
1000 (738)
2100 (1549)
3600 (2655)
2.4 (1.8)
5.7 (4.2)
1.5 (8.5)
20 (14.8)
46 (34)
96 (71)
160 (118)
40 (295)
800 (590)
1300 (959)
2800 (2065)
4800 (3540)
STANDARD TORQUE CHART
NOTE: Above torques are for “rigid” joints, or joints meet-
ing the following conditions:
1. Damage will not occur to joined members of
an assembly.
2. It is desirable to use a higher clamping force.
3. Fastener threads are NOT lubricated prior to
assembly.
The following conditions will require a torque value differ-
ent than stated above:
1.
Reduced torque required; non-parallel clamping sur-
faces, thick or highly compressible gaskets are used,
or when a higher torque may damage joined assem-
blies.
2.
Clip nuts, weld nuts, self-tapping hardware, or any
condition that causes reduced thread engagement will
warrant a torque less than stated above.
3.
Special torque values, stated in this manual, must
be strictly adhered to as stated in the specific opera-
tion.
NOTE: A number of special torques are used in assem-
bly of tractors. See list.
