Original BMC part number 6K287, Bearing for bevel pinion - rear (inner)
Tapered roller bearing Cup and Cone Set - 1.25 x 2.8593 x 1.1875 inch
3188/3120 (ISO standard)

Bearing,differential carrier, MGA all models
PART NUMBER         SOURCE
6K287               BMC, British Leyland, Rover
5HA022, 7H8024,     BMC alternate numbers
236463, H3007380,   BMC alternate numbers
100897, 100897A,    BMC alternate numbers
100897AZ, 5539Z103, BMC alternate numbers
5539Z222            BMC alternate numbers
100897A             Brown & Gammons
9192035, P43305     CHRYSLER
5HA022              Daimler-Benz
6K287               Engel Imports
8845460             GM
100897A             MGOC Spares
125-600             Moss US
100897A, 100897AZ   Moss UK
5-703               Victoria British

MANUFACTURER   PART NUMBER
FAG 	       K3188S+K3120
NTN	       3188+3120
RHP 	       3188S+3120
SKF 	       K3188S+K3120
TIMKEN         3188S+3120

Applications:
MG, MGA, TD, TF, all
MG, MGB, 1962-1967 w/Banjo Type Axle
Austin Healey 100, 100-6, 3000 BN1-BN4 w/Early Spiral Bevel Diff.;
AH Sprite & MG Midget (differential housing "C")
Morris Minor from (c)228267 to (c)990289