This part number replaces #24143.
24123 had silver contacts; the replacement 24213 has superior silver tungsten carbide contacts, and is electrically identical.

200A, with silver tungsten carbide contacts.
Normally Open Contacts, SPST, One circuit: Off - On
Housing: Plated steel
Studs: Copper 5/16" -24 thread, hexnuts and lockwashers included.
Coil, ignition and ground terminals: Steel 10-32 thread, hexnuts and lockwashers included.
Bracket mounting holes 5/16" x 19/32" (7.9 x 15.1) on 2 13/64" centers (56.0mm).