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 6645-01-241-9483
NSN 5855-00-055-1430
NSN 6645-01-446-1994
NSN 5925-00-446-2464
NSN 5975-01-352-5647
NSN 5998-01-566-7672
NSN 5915-00-490-6424
NSN 6610-01-426-5090
NSN 5945-01-421-1808
NSN 5930-00-700-9190
NSN 5915-00-810-0164
NSN 6240-01-373-6417