Inside diameter .250 in, outside diameter .472 in,
No other part numbers with same form, fit, and function found.
NSN 6130-01-656-9972
NSN 5990-00-524-2293
NSN 5945-00-131-6699
NSN 5835-01-487-3042
NSN 5945-00-809-4998
NSN 6220-00-682-8292
NSN 5910-01-052-5825
NSN 6240-00-179-2015
NSN 6645-00-912-6245
NSN 6650-00-702-3560
NSN 6320-00-845-3261
NSN 5915-01-449-1457