Diameter a 5.375 inches; diameter g 5.875 inches; clear anodize; made from unfinished collar tower co3981-2
No other part numbers with same form, fit, and function found.
NSN 5855-01-087-1417
NSN 5960-00-204-7506
NSN 4140-00-871-3000
NSN 5920-00-341-6340
NSN 2925-00-631-0548
NSN 5999-01-420-4737
NSN 5925-01-522-8369
NSN 6220-01-464-8928
NSN 5975-00-509-2879
NSN 5950-01-364-9555
NSN 5960-01-224-7151
NSN 4140-00-381-4563