4 bolt holes on a 3.81 inch outside diameter circle; material is 4340 steel per ams 6415
Classification: Parts for guided missiles
NSN 5960-01-019-0017
NSN 6610-01-108-6056
NSN 5855-01-646-9254
NSN 6220-01-353-9026
NSN 6105-01-660-6622
NSN 5945-00-973-0654
NSN 5925-01-292-1101
NSN 5985-01-491-3454
NSN 6240-01-195-8696
NSN 5835-00-334-6556
NSN 6240-00-280-0186
NSN 6145-00-451-3534