In the Slimline (FORD) kit it is used with L68149/10 (161530) inner bearing and C610H (187090) seal.
Slimline Bearing kit TWK10 (187020) includes outer bearing LM12749, inner bearing L68149/10, seal C610H, Grease Cap and split pin.
Also used as an outer bearing in the following bearing kit:
Composite kit with the inner bearing LM67048/10 and seal H190 37.5mm I.D x 59.1mm O.D x 8mm
Composite bearing kits are found in some caravans manufactured in Australia between 1985 and 2010