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 4140-01-454-4537
NSN 5930-00-164-2713
NSN 5975-01-050-5002
NSN 5915-01-320-8683
NSN 6150-01-479-1646
NSN 6685-01-546-0804
NSN 5999-01-397-8559
NSN 6110-01-339-9977
NSN 5965-01-120-6086
NSN 5925-01-179-1453
NSN 5990-01-485-0260
NSN 6650-01-495-3744