An auxiliary longitudinal member of the structural framework of a fuselage, nacelle, empennage, wing, and the like. It is designed to stiffen and/or support the skin by attachment of bulkheads, formers, frames, ribs, and the like.
NSN 6685-01-167-7364
NSN 5935-01-146-4363
NSN 6620-00-280-2874
NSN 2925-01-455-2558
NSN 5999-01-643-3593
NSN 6135-01-581-1039
NSN 6150-01-624-6501
NSN 5835-01-086-6999
NSN 4140-00-185-9694
NSN 5990-00-723-2482
NSN 6645-01-633-1852
NSN 5905-01-447-2806