6 inch outside diameter; lower; floats the cradle while in the ocean either deploying or recovering the autonomous underwater vehicle
No other part numbers with same form, fit, and function found.
NSN 5950-00-966-3633
NSN 5999-00-763-8713
NSN 5985-00-901-1774
NSN 5915-01-492-3362
NSN 6105-01-339-5387
NSN 6620-01-566-3456
NSN 5920-00-066-6885
NSN 5930-01-265-0877
NSN 5905-01-134-8717
NSN 6610-01-024-0675
NSN 6645-01-161-3689
NSN 6145-00-360-7760