Cessna 1969-1976 172 Series Service Manual page 11

RECOMMENDED NUT TORQUES
THE TORQUE VALUES STATED ARE POUND-INCHES, RELATED
ONLY T O STEEL NUTS ON OIL-FREE CADMIUM PLATED THREADS.
FINE THREAD SERIES
I
L
8-36
10-32
5/16-24
7/16 -20
9/16
-
18
5/8-18
7/8-14
1-14
1-1/8- 1 2
1-1/4-12
1/4-28
3/8-24
1/2-20
3/4-16
8-32
10-24
1/4-20
5/16
-
18
3/8- 16
7/ 16
-
14
1/2-13
9/16-12
5/8-11
3/4
-
10
7/8-9
1-8
1-1/8-8
1- 1/4 -8
TENSION
TORQUE
STD
(NOTE 1)
12-15
20
-
25
50-70
100- 140
160-190
450-500
480-690
800
-
1000
1100- 1300
2300-2500
2500-3000
3700-5500
5000-7000
9000-11000
(NOTE 4)
12- 15
20-25
40-50
80-90
160
-
185
235-255
400-480
500-700
700-900
1150- 1600
2200-3000
3700-5000
5500-6500
6500-8000
A LT
(NOTE 2)
20-28
50-75
100-150
160-260
450-560
480 -730
800
-
1070
1100-1600
2300-3350
2500-4660
3700-6650
5000-10000
9000-16700
SHEAR
TORQUE
ST D
(NOTE 3)
7-9
12-15
30-40
60-85
95-110
270
-
300
290-410
480-600
660-780
1300-1500
1500
-
1800
2200 -3300
3000 -4200
5400-6600
COARSE THREAD SERIES
(NOTE 5)
7 -9
12-15
25-30
48-55
95-100
140-155
240-290
300-420
4 20
-
540
700-950
1300-1800
2200-3000
3300 -4000
4000-5000
A LT
(NOTE 2)
12-19
30-48
60-106
95-170
270-390
290-500
480-750
660- 1060
1300 -2200
1500-2900
2200-4400
3000 -6 300
5400-10000
NOTES
1. Covers AN310, AN315, AN345, AN363, MS20365, MS21042, MS21044, MS21045 and MS21046.
2. When using AN310
or
AN320 castellated nuts where alignment between the bolt and cotter pin slots is not
reached using normal torque values, u s e alternate torque values o r replace the nut.
3. Covers AN316, AN320, MS20364 and MS21245.
4. Covers AN363, MS20365, MS21042, MS21043, MS21044, MS21045 and MS21046.
5. Covers AN340.
DO NOT REUSE SELF-LOCKING NUTS.
The above values
are
recommended for all installation procedures contained in this manual, except where
other values are stipulated. They are not t o be used for checking tightness of installed p a r t s during service.
~~~~ ~
Figure 1-4. Torque Values
Change 2 1-5/(1-6 blank)