Fasteners torque table (ISO)
NOTE
If no special torques are specified, use these tightening torques. The values are for UNF threaded
bolts, plated or unplated, according to the supplier's delivery. Fasteners can be dry or lubricated with
normal engine oil. The values do not apply if graphite, moly-disulfide or other high-pressure lubricant
is used.
ISO class
number
8.8
10.9
12.9
Screw head
identification
(see Note 1)
Screw size
LB FT
nM
LB FT
nM
LB FT
nM
Min
MAX
Min
MAX
Min
MAX
Min
MAX
Min
MAX
Min
MAX
M4
2
3
3
4
3
4
4
5
Due to the low flexibility of
these fasteners, the
tightening torque range
must be determined
individually for each
application.
In general, the tightening
torque ranges specified for
Class 10.9 fasteners can be
safely applied to Fasteners
12.9
* M14 is not the preferred
size
M5
5
6
6.5
8
7
8
7.5
11
M6
8
9
10.5
12
11
13
15
17.5
M8
19
23
26
31
27
32
27
43
M10
38
45
52
61
54
64
73
87
M12
66
79
90
75
93
112
125
150
*M14
106
127
144
172
149
179
200
245
M16
160
200
217
271
230
280
310
380
M20
320
380
434
515
450
540
610
730
M24
500
600
675
815
780
940
1,050
1,275
M30
920
1,100
1,250
1,500
1,470
1,770
2,000
2,400
M36
1,600
1,950
2,175
2,600
2,580
3,090
3,500
4,200
MOWER DECK
80
Summary of Contents for PRIMO HT 20 NC
Page 1: ...OPERATOR S MANUAL PRIMO HT 1 2020 20 Tractor is Zetor Since 1946 1 2020 1 2020...
Page 3: ...2...
Page 7: ...6...
Page 9: ...NOTES 8...
Page 11: ...NOTES 10...
Page 15: ...NOTES 14...
Page 29: ...NOTES 28...
Page 32: ...PRIMOHT20NC_0003 1 Brake Light 2 Turn Signal Light GENERAL INFORMATIONS 31...
Page 37: ...NOTES 36...
Page 68: ...PRIMOHT20NC_0057 MOWER DECK 67...
Page 78: ...1 3 Screw 2 L PRIMOHT20NC_0075 1 L 2 F 3 R PRIMOHT20NC_0074 MOWER DECK 77...
Page 85: ...NOTES 84...
Page 91: ...NOTES 90...
Page 93: ...NOTES 92...
Page 129: ...NOTES 128...
Page 132: ...131...