Instruction Manual

Instructions for Continued Airworthiness 190-00792-12 Rev 1
for the Garmin G500H Installation in Eurocopter AS350 Page 33 of 80
2. Torque Wrenches
Warning: Do not exceed maximum allowable torque value. Overstressing of fastener may
result.
Standard hardware torque values are given in the following tables 20-01 through table 20-03.
Table 20-01 gives recommended torque values for fine thread fasteners, shear and tension
applications. Table 20-02 gives recommended torque values for coarse thread fasteners, shear
and tension applications. Table 20-03 gives recommended torque values for phillips head
screws.
Table 20-01- Recommended Torque Values for Fine Thread Fasteners
Thread Size
Fractional (decimal)
Shear
Tension
Recommended
in-lb (N m)
Maximum
in-lb (N m)
Recommended
in-lb (N m)
Maximum
in-lb (N m)
8-36
(0.1640-36)
7-9
(0.79-1.02)
12
(1.36)
12-15
(1.36-1.69)
20
(2.26)
10-32
(0.1900-32)
12-15
(1.36-1.69)
25
(2.82)
20-25
(2.25-2.82)
40
(4.51)
¼-28
(0.2500-28)
30-40
(3.38-4.51)
60
(6.77)
50-70
(5.64-7.90)
100
(11.29)
5/16-24
(0.3125-24)
60-85
(6.77-9.60)
140
(15.81)
100-140
(11.29-15.81)
225
(25.41)
3/8-24
(0.3750-24)
95-110
(10.73-12.42)
240
(27.11)
160-190
(18.07-21.46)
390
(44.05)
7/16-20
(0.4375-20)
270-300
(30.49-33.88)
500
(56.48)
450-500
(50.83-56.48)
840
(94.88)
½-20
(0.5000-20)
290-410
(32.75-46.31)
660
(74.55)
480-690
(54.22-77.94)
1,100
(124.25)
9/16-18
(0.5625-18)
480-600
(54.22-67.77)
960
(108.44)
800-1,000
(90.36-112.96)
1,600
(180.73)
5/8-18
(0.6250-18)
660-780
(74.55-88.10)
1,400
(158.14)
1,100-1,300
(124.25-146.84)
2,400
(271.10)
¾-16
(0.7500-16)
1,300-1,500
(146.84-169.44)
3,000
(338.88)
2,300-2,500
(259.80-282.40)
5,000
(564.80)
7/8-14
(0.8750-14)
1,500-1,800
(169.44-203.32)
4,200
(474.43)
2,500-3,000
(282.40-338-88)
7,000
(790.72)
1-12
(1.0000-12)
2,200-3,300
(248.51-372.76)
6,000
(677.76)
3,700-5,500
(417.95-621.28)
10,000
(1129.6)
1-1/8-12
(1.1250-12)
3,000-4,200
(338.88-474.43)
9,000
(1016.6)
5,000-7,000
(564.80-790.72)
15,000
(1694.4)
1-1/4-12
(1.2500-12)
5,400-6,600
(609.98-745.53)
15,000
(1694.4)
9,000-11,000
(1016.6-1242.6)
25,000
(2824.0)
20-10-00