Fasteners Torque Table (Iso) - Zetor PRIMO HT 20 NC Operator's Manual

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
8.8
number
Screw head
identification
(see Note 1)
LB FT
Screw size
Min
M4 2
M5 5
M6 8
M8 19
M10 38
M12 66
*M14 106
M16 160
M20 320
M24 500
M30 920
M36 1,600 1,950 2,175 2,600 2,580 3,090 3,500 4,200
80
MOWER DECK
nM
MAX Min MAX
3 3 4
6 6.5 8
9 10.5 12
23 26 31
45 52 61
79 90 75
127 144 172
200 217 271
380 434 515
600 675 815
1,100 1,250 1,500 1,470 1,770 2,000 2,400
10.9
LB FT nM
Min MAX Min
3 4 4
7 8 7.5
11 13 15
27 32 27
54 64 73
93 112 125
149 179 200
230 280 310
450 540 610
780 940 1,050 1,275
12.9
LB FT nM
MAX Min MAX Min
5 Due to the low flexibility of
these fasteners, the
11
tightening torque range
must be determined
17.5
individually for each
43
application.
87
In general, the tightening
150
torque ranges specified for
245 Class 10.9 fasteners can be
safely applied to Fasteners
380
12.9
730
* M14 is not the preferred
size
MAX