BS-5S-21 › Complete Document History
Specification for aircraft material. '20' carbon steel (suitable for welding) (25/35 tonf/sq in: maximum size 6 inches diameter or minor sectional dimension)
Obsolete Revision Information: |
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PD 6309 - AMENDMENT 1 - Jan. 1, 1968
1964 EDITION - WITHDRAWN, 9/27/2012 - Jan. 31, 1964 |