Mooney M20V - Page 40

MOONEY INTERNATIONAL CORPORATION
M20V SERVICE AND MAINTENANCE MANUAL
Page
Date
11
MAR 2017
Rev Date
TORQUE VALUES
See Following Tables.
FLARE NUT TORQUE VALUES- Tighten to minimum torque value for appropriate size as shown in table below.
CAUTION - These torque values are derived from oil- free cadmium- plated threads.
FLARE NUT T ORQUE
FITTING SIZE
ALUMINUM TUBING STEEL TUBING
TORQUE - INCH POUNDS
MINIMUM MAXIMUM MINIMUM MAXIMUM
-3 - 30 70 -
-4 40 65 50 90
-5 60 80 70 120
-6 75 125 90 150
-8 150 350 155 250
-10 200 350 300 400
-12 300 500 430 575
-16 500 700 550 750
-20 - 600 900 -
-24 - 600 900 -
METRIC BOLTS, SCREWS & 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
assembly capable of being tightened to the bolt proof
load without thread stripping occurring.
The torque value to be set for a particular size of screw
is dependent upon:
1) Material of the screw.
2) Parent material (steel, non- ferrous metal or
plastic).
3) Whether the screw is untreated or plated.
4) Whether the screw is dry or lubricated.
5) The depth of the thread.
TIGHTENING TORQUES - Untreated Hardware (Black Finish) Friction Coefficient 0.14
NOMINAL
DIAMETER
(Coarse Thread)
PROPERTY CLASS
5.6 8.8 10.9 12.9
TORQUE Ma
Nm/Ft. Lb. Nm/Ft. Lb. Nm/Ft. Lb. Nm/Ft. Lb.
M3 0.60/0.44 1.37/1.01 1.92/1.42 2.30/1.70
M4 1.37/1.01 3.10/2.29 4.40/3.25 5.25/3.87
M5 2.70/1.99 6.15/4.54 8.65/6.38 10.4/7.6
M6 4.6/3.3 10.5/7.7 15/11 18/13
M7 7.6/5.6 17.5/12.9 25/18.4 29/21.3
M8 11/8.1 26/19 36/26 43/31
M10 22/16 51/37 72/53 87/64
M12 39/28 89/65 125/92 15 0/110
M14 62/45 141/103 198/16 240/177
M16 95/70 215/158 305/224 365/269
M18 130/95 295/217 420/309 500/368
5-20-01