E47363
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
70-23-00
ALL ú ú N01 Page 219 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 912-054-N00
(2) Torque Limits
(a)
Self-locking nuts, bolts, and heli-coils must agree with the torque limits in the Figure 215 and Figure 216.
(b)
Use a special test for these nuts and bolts:
1) These nuts use a stainless steel, a corrosion or a heat-resistant steel, a nickel alloy, or an AMS 6304 steel. a) Decrease by 0.003 inch (0.076 mm) the specified pitch
diameter, the maximum diameter, and the minimum diameter of the test bolt threads. b) Only 0.190-32 UNF-3A, 0.190-24 UNC-3A and all larger threads must have the smaller diameters.
2) These unplated nuts use a stainless steel, a corrosion resistant-steel, a nickel alloy, or an AMS 6304 steel. a) These nuts have a large thread to accept a plate at
assembly. b) Apply a silver plate to a thickness of 0.0003-0.0006 inch (0.0077-0.0152 mm). c) Use an unplated bolt with a standard thread to measure the torque.
3) These unplated nuts use a stainless steel, a corrosion resistant-steel, a nickel alloy, or an AMS 6304 steel. a) These parts are usually attached to brackets or other
equivalent parts.
FINE THREAD SERIES COARSE THREAD SERIES
THREAD SIZE** INCHES MATING BOLT METERS) (NEWTON-TORQUE MAX LOCKING METERS) (NEWTON-AWAY TORQUE MIN BREAK- INCHES THREAD SIZE** MATING BOLT METERS) (NEWTON-TORQUE* MAX LOCKING METERS) (NEWTON-AWAY TORQUE* MIN BREAK-
0.112 -48NF-2A 0.138 -40NF-2A 0.164 -36NF-2A 0.250 -28UNF-3A 0.3125 -24UNF-3A 0.375 -24UNF-3A 0.4375 -20UNF-3A 0.500 -20UNF-3A 0.190 -32UNF-3A 16.9 0.3 0.7 1.0 1.5 6.8 9.0 11.3 3.4 2.0 0.1 0.1 0.2 0.2 0.4 0.7 1.1 1.6 0.500 -14UNC-3A 0.4375 -14UNC-3A 0.112 -40NC-2A 0.138 -40NC-2A 0.164 -32NC-2A 0.190 -24UNC-3A 0.250 -20UNC-3A 0.3125 -18UNC-3A 0.375 -16UNC-3A 16.9 0.3 0.7 1.0 1.5 3.4 6.8 9.0 11.3 2.70.1 0.1 0.2 0.2 0.5 0.8 1.4 1.9
*INSTALLATION OR REMOVAL
**USE THE LISTED BOLT SIZES FOR TORQUE TESTING CADMIUM PLATED NUTS, CARBON STEEL NUTS, ALLOY STEEL NUTS AND ALUMINUM NUTS.
L-90041
Torque Check For Reuse of Self-Locking Nuts, Bolts, and Helical Coil Inserts (At Room Temperature and Lubricated With Engine Oil)(Newton-Meters) Figure 216
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
70-23-00
ALL ú ú N01 Page 220 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 STANDARD PRACTICES - ENGINE(35)
