Differentiated by 1-1/4 in. Diameter hole
NSN 6650-00-590-9073
NSN 6105-00-719-6595
NSN 6240-01-316-4657
NSN 6320-00-004-9158
NSN 5855-01-147-6024
NSN 6610-00-123-4314
NSN 2925-01-604-8984
NSN 6130-01-549-3441
NSN 5945-01-532-4521
NSN 5935-01-103-3495
NSN 5996-01-598-3525
NSN 6150-01-474-4320