Boeing 707 - Terminal Installation; Installation of Copper Terminals

3. TERMINAL INSTALLATION
A. Installation of Copper Terminals
CAUTION
DO NOT USE ANODIZED WASHERS, DYED WASHERS, OR STEEL WASHERS
ON THE STUD OR FASTENER BETWEEN THE WIRE TERMINAL AND THE
EQUIPMENT SURFACE OR THE TERMINAL BOARD. UNSATISFACTORY
PERFORMANCE OF THE ELECTRICAL CONNECTION OCCURS.
NOTE: Copper terminals are attached to:
• Either brass studs or brass screws with tin plated brass nuts
• Either steel studs or steel screws with self-locking steel nuts.
Table 4
INSTALLATION HARDWARE FOR COPPER TERMINALS
Hardware Part Number Supplier
Nut, Plain
MS35649- ( ) QPL
MS35650-( ) QPL
Nut, Self Locking
BACN10JC( ) Boeing
MS21042L( ) QPL
Lockwasher for Plain Nuts MS35338-( ) QPL
Lockwasher for Self Locking Nuts BACW10EC( )S Boeing
Washer, Flat NAS1149F( )P QPL
Washer, Spacer, Flat AN961-( ) QPL
Table 5
INSTALLATION TORQUE FOR COPPER TERMINALS
Stud Size Hardware
Torque
(inch-pound)
Minimum Maximum
3-48
Nut, Plain 3.5 4.5
Nut, Plain With Lockwasher 3.5 4.5
Nut, Self-Locking 3.5 4.5
4-40
Nut, Plain 5.5 6.5
Nut, Plain With Lockwasher 5.5 6.5
Nut, Self-Locking 5.5 6.5
5-40
Nut, Plain 6 7
Nut, Plain With Lockwasher 6 7
Nut, Self-Locking 6 7
ELECTRICAL CONNECTION OF EQUIPMENT AND INSTALLATION OF TERMINAL LUGS
707, 727-787
STANDARD WIRING PRACTICES MANUAL
20-30-00
Page 10
Oct 15/2017D6-54446
ECCN 9E991 BOEING PROPRIETARY - See title page for details