BOLT SPECIFICATIONS
Page 6
07/18
STANDARD BOLT HEAD MARKINGS AND TORQUE SPECIFICATIONS:
CAUTION:
Loose bolts can cause elongation of holes and part failures resulting in dangerous operating
conditions and equipment breakdown. Check all bolts and nuts periodically during equipment
operation and keep them tightened to the specified torque. If hardware replacement becomes
necessary, replace with equivalent metric grade number.
NOTE:
The following torque figures are those recommended for zinc plated, lightly oiled bolts.
Recommended assembly torques may be obtained by multiplying the torque figures in the
table below by:
0.78
– for degreased zinc plated bolts
1.10
– for black oxide finished bolts
0.81
– for M20x2.5P Tine Toolbar Hardware
It is necessary that all bolts be tightened to the correct recommended assembly torque.
lbf.ft
Nm
lbf.ft
Nm
lbf.ft
Nm
7/16
UNF
43
59
60
82
-
-
7/16
UNC
39
53
54
74
-
-
1/2
UNF
67
91
94
128
-
-
1/2
UNC
59
81
83
113
-
-
5/8
UNF
135
184
186
253
-
-
5/8
UNC
117
159
165
224
-
-
3/4
UNF
235
319
325
441
-
-
3/4
UNC
210
285
290
394
-
-
7/8
UNF
370
502
520
706
-
-
7/8
UNC
335
455
470
638
-
-
1
UNF
550
746
775
1052
-
-
1
UNC
505
685
710
963
-
-
M10
1.5
29
40
41
56
-
-
M12
1.75
51
70
73
100
-
-
M16
-
-
-
-
-
170
231
M16
2.0
126
171
180
245
-
-
M18
-
-
-
-
-
243
330
M20
-
-
-
-
-
265
360
M20
2.5
247
335
351
477
-
-
M22
-
-
-
-
-
340
462
M24
-
-
-
-
-
370
502
M24
3.0
425
577
608
825
-
-
Recommended Assembly Torque
8.8
10.9
Wheel Stud
Metric Grade Number
S.A.E Grade Number
5
8
Size
Thread
Pitch
Wheel Stud
Head Markings
(Manufacturers marks
may vary)
Head Markings
(Manufacturers marks
may vary)
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