A barrier including frame and still used wherever watertight or airtight construction is required. May also be used where local conditions require construction which is nontight. Excludes hatch,marine.
Classification: Doors, windows and frames and thresholds for doors of iron or steel
NSN 6240-01-641-2666
NSN 6620-01-261-2985
NSN 7035-01-471-4884
NSN 6110-01-025-0507
NSN 5855-00-337-3679
NSN 7035-00-437-7950
NSN 5996-01-106-7328
NSN 5998-01-201-2181
NSN 5996-00-298-1932
NSN 5985-00-595-8633
NSN 6610-01-464-3037
NSN 5960-01-503-0362