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MGA Part Numbers - 7H9830
Lock and Key - ignition switch

PART NO.  SPL.PAGE  DESCRIPTION                                                                     
AHH5369   15.N.3    Switch -ignition -(switches, electrical, 1500)
AHH5369   16.N.3    Switch -ignition -(switches, electrical, 1600 and 1600-MK-II) -changed to 3H2825
AHH5369   TC.N.3    Switch -ignition -(switches, electrical, Twin Cam)
3H2825    16.N.3    Switch -ignition -(switches, 1600 and 1600-MK-II) -was AHH5369
7H9380    16.N.3    Lock and key -ignition switch -(switches, 1600 and 1600-MK-II)-
    changed to 2H4185 -not available use 24G1345 -(7H9380 was likely an error part no.)
7H9830    15.N.3    Lock and key -ignition switch -(switches, electrical, 1500)
7H9830    TC.N.3    Lock and key -ignition switch -(switches, electrical, Twin Cam)
2H4185    16.N.3    Lock and key -ignition switch -(switches, 1600 and 1600-MK-II)-changed 
        to 24G1345 -also was 7H9380 (which was likely an error part no.)
24G1345   16.N.3    Lock and key -ignition switch -(switches, 1600 and 1600-MK-II) -was 2H4185-
          -also was 7H9380 (which was likely an error part no.)
ANK4646   15.N.3    Key - ignition switch
ANK4646   15.R.14   Key (2) -(cyl -lock compl w/keys, lock ass'y-priv, door fit's, 1500
    Coupe)
ANK4646   16.N.3    Key (2) -(lock and key, switches, 1600 and 1600-MK-II)
ANK4646   16.R.15   Key (2) -(cylinder -lock with keys, lock assy private, door fittings,
    1600 and 1600-MK-II Coupe)
ANK4646   TC.N.3    Key (2) -(lock and key, ignition, switches, electrical, Twin Cam)
ANK4646   TC.R.14   Key (2) -(lock cylinder with keys, door fittings, Coupe, Twin Cam)

Original type screw post terminals Later style ignition switch with Lucar connectors
AHH5369 Ignition Switch (with set screw terminals) - 3H2825 Ignition Switch (with Lucar terminals
The new part number has the spade terminals, introduced in late 1600 production.
The hexagonal bezel nut is aftermarket, where the original was round, chrome, with drive slot across the face.
Lock and key, ignition switch
For more information about this switch in service see:
ET-124 Ignition SwitchTerminals and Wiring.
ET-125 Ignition Switch Keying & Internal Parts.
ET-126 Ignition Switch Repairing Electrical Parts.
ET-127 Ignition Switch Key Types and Key Cutting.

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