Mooney M20R - Flare Nut Torque Values

MOONEY
AIRCRAFT
CORPORATION
MZOR
SERVICE
AND
MAINTENANCE
MANUAL
FLARE
NUT
TORQUE
VALUES-
T~ghten
to
min’imum
torque
value for
appropriate
size
as
shown
(Figure
51).
CAUTION
These
torque
values
are
deri)/ed
from
oil-free
cadmium-plated
threads.
FITTING
SIZE
ALUMINUM
TUBING
STEEL
TUBING
TORQUE
INCH
POUNDS
MINIMUM
i
MAXIMUM
MINIMUM
MAXIMUM
-3
30
70
-4
4b
,j
50
90
-5
60
80
70
120
-6
75
125
90
150
-8
150
250
155
250
-10
200
i
350
300
400
-12
300
500
430
575
-16
500
700
550
750
-20
600
900
-24
600
1
900
FLAPENUTMWUE
FIGURE 51
METRIC
BPLTS.
SCREWS
8 NUTS
Failure
of
threaded
fasteners
due
to
over-tightening
can
occur
by
bolt
shank
fracture
or
by
stripping
of
the
nut
and/or
bolts
thread.
A bolt
or
screw
assembled
with
a
nut
of the
appropriate
class
is
intended
to
provide
an
assem-
bly
capable
of
being
tightened
to
the bolt
proof
load
without thread
stripping
occurring.
The
torque
value
to
be set
for
a
particular
size
of
54rew
is
dependent
upon:
1)
Material of
the
screw.
2)
Parent
material
(steel,
non-ferrous
metal
or
plastic).
3)
V~hether
the
screw
is untreated
or
plated.
4)
V~hether
the
screw
is
dry
or
lubricated.
5)
The
depth
of
the
thread.
TIGHTENING
TORQUES
Untreated
Hardware
(Black
Finish)
Fiicfion
Coefficienf
0.
14
NOMINAL
5.6
8.8
PROPERPI
10.9
12.9
DIAMETER
CLASS
(Coarre
Thread)
Nmlff.lb.
Nmlff~lb.
TORQUE Ma
Nmlff.lb.
Nmlff.lb.
Ms
0.60/0.44
1.37/11.01
1.92/1.42
2.30/1.70
M4
1.37/1.01
3.1
0121.29
4.40/3.25
5.25/3.87
Ms
2.70/1 .99
6.15/4.54
8.65/6.38
19.4n.6
Ms
4.6/3.3
10.5/7.7
15/11
18/13
M7
7.6/5.6
17.5/112.9
25/18.4
29/21.3
Ms
1118.1
2~1B
36/26
43/31
M10
22/16
51
137
72/53
87/64
M12
39/28
89/65
125/92
150/110
M14
62/45
i 41
1~103
198/146
240/in
Mis
95/70
21
5/1158
305/224
365/269
Mis
130/95
295/217
420/309
500/368
Mn
250/1 84
570/
800/590
960/708
M20
184/135
590/435
71 0/523
M24
31
5/232
1020/752
1220/899
M27
470/346
1070/789
1510/1113
1810/1334
M30
635/468
1450/1/069
2050/1511
2450/i
806
M33
865/637
19701i452
27/0/2042
3330/2455
M36
11111819
2530/11865
3560/2625
4280/31 56
M39
1440/1062
3290/a426
4620/5407
5550/4093
5-20-01
Island Enterprises