PART NO.  SPL.PAGE  DESCRIPTION                                                           
ATB7246  TC.H.2    Housing assembly -bearing (2) -(rear axle, ARDB model 1600 and
    1600-MK-II) -Com.(C)91240
ATB7246   TC.H.2    Housing assembly -bearing (2) -(rear axle, Twin Cam)
ATB7248   16.H.7    Stud -disc plate to housing (8) -(rear axle, ARDB model 1600 and
    1600-MK-II) -Com.(C)91240
ATB7248   TC.H.2    Stud -disc plate to housing (8) -(rear axle, Twin Cam)
ATB7249   16.H.7    Stud -extension to housing (8) -(rear axle, ARDB model 1600 and
    1600-MK-II) -Com.(C)91240
ATB7249   TC.H.2    Stud -extension to housing (8) -(rear axle, Twin Cam)

These pages concern the rotating wheel bearing housing (and pressed in studs) on the rear axle of the MGA Twin Cam, and subsequently the MGA 1600 and 1600-MK-II cars that were assembled with the ARDB option (All Round DiscBrakes).

Refer to illustration at right (click for larger image).
Item 44 is the ATB7246 rotating bearing housing.
Item 45 is the ATB7248 Stud pressed in and extending inboard to attach the brake plate.
Item 46 is the ATB7249 Stud pressed in and extending outboard to attach the Hub Extension.

Hub Extensions and brake plates will be covered on following pages, with part numbers in numerical sequence.