Assembly
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20-00-02/70-00-01
Table 514. Coupling Nuts, Flareless Tube
TUBE SIZE CODE* Lubrication from Table 503 AL(6061-T6) TUBING WALL THICK. (in.) TORQUE
MINIMUM (IN-LBS) MAXIMUM (IN-LBS) MINIMUM N-m MAXIMUM N-m
HEAVY THIN
-2 A,B 75 85 8.4738600 9.6037080
-3 C .028 95 105 10.7335560 11.8634040
-3 A,B 95 105 10.7335560 11.8634040
-4 C .035 135 145 15.2529480 16.3827960
-4 D .028 120 135 13.5581760 15.2529480
-4 A,B 135 145 15.2529480 16.3827960
-5 A,B 175 195 19.7723400 22.0320360
-6 C .049 215 245 24.2917320 27.6812760
-6 D .028 190 215 21.4671120 24.2917320
-6 A,B 215 245 24.2917320 27.6812760
-8 C .065 470 510 53.1028560 57.6222480
-8 D .035 340 380 38.4148320 42.9342240
-8 D .049 340 380 38.4148320 42.9342240
-8 A,B 470 510 53.1028560 57.6222480
-10 C .083 620 680 70.0505760 76.8296640
-10 D .035 380 450 42.9342240 50.8431600
-10 D .049 380 450 42.9342240 50.8431600
-10 A,B 620 680 70.0505760 76.8296640
-12 C .095 855 945 96.6020040 106.7706360
-12 D .049 400 470 45.1939200 53.1028560
-12 D .065 400 470 45.1939200 53.1028560
-12 A,B 855 945 96.6020040 106.7706360
-16 C .065 1140 1260 128.8026720 142.3608480
-16 D .049 750 850 84.7386000 96.0370800
-16 A,B 1140 1260 128.8026720 142.3608480
-20 D .049 1000 1100 112.9848000 124.2832800
-20 A,B 1520 1680 171.7368960 189.8144640
-24 A,B 1900 2100 214.6711200 237.2680800
-32 A,B 2660 2940 300.5395680 332.1753120
*CODE: A. Steel or CRES nut, tube, or fitting B. Aluminum fittings or nuts used with CRES tubing C. Aluminum fittings or nuts used with heavy wall aluminum tubing D. Aluminum fittings or nuts used with thin wall aluminum tubing (6061-T6)
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Assembly
20-00-02/70-00-01
E. Procedure - Preparing and Installing O-rings on Fittings
(1)
Apply small amount of oil (MIL-L-7808) or (MIL-L-23699) lubricant to the O-ring.
(2)
Install O-ring on fitting as shown in Figure 505, View A.
(3)
Insert fitting assembly with installed O-ring into boss until it bottoms tightly as shown in Figure 505, View B.
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