This is item 53a
An assembled inner component of a tapered roller bearing, consisting of a cone (which provides a contact surface for the rolling elements of the bearing), a complement of tapered rollers (the rolling elements), and frequently a retainer (which spaces the rolling elements).
Classification: Other ball or roller bearings, including combined ball/roller bearings, nesoi
NSN 5950-01-057-4032
NSN 6135-01-204-8712
NSN 5935-01-444-1851
NSN 5990-01-354-6255
NSN 4140-00-295-0787
NSN 6320-01-384-3850
NSN 5925-01-227-2798
NSN 5835-01-624-5666
NSN 6650-01-650-1762
NSN 6110-01-273-0223
NSN 6135-01-633-8502
NSN 5905-00-233-5932