This is for the FRONT.... of the REAR leaf springs.. it holds the head of the leaf spring BRACKET onto the body.
Often the C clip is rusted out or a PITA to salvage...
This is the KIT of 6 bolts and 6 nuts.
Over the years there has been different versions of this C clip about.. and also people trying to put incorrectly threaded bolts into them ie metric to imperial etc.... DON'T DO THAT.