There is 1 drawing for part 21-4840 available in AirCorps Library

Manufacturer's drawing for Boeing Aircraft Corporation B-17 Flying Fortress. Drawing number 21-4840
Manufacturer's Drawing
Boeing Aircraft Corporation,   B-17 Drawings - Early,   Page: --,   Revision: a  
JUMP ASSY. NO. 6 1/4 TERMINAL BONDING
Associated Aircraft:   B-17  

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