Used on 36e84-18qe starter
A nut having an externally splined sleeve which holds it in position when forced into a hole of slightly smaller diameter.
NSN 2925-01-294-0585
NSN 5835-00-738-1099
NSN 5950-01-396-3278
NSN 5855-00-951-6483
NSN 5895-01-524-8742
NSN 5895-01-419-1713
NSN 6135-00-269-5843
NSN 5975-00-052-9912
NSN 6130-00-461-1674
NSN 5920-01-566-1532
NSN 6145-00-648-2726
NSN 6110-01-394-9891