If your toilet partition (bathroom stall) wall bracket is stamped 1830, then chances are you have the Two Ear Wall Bracket for 1-1/4″ thick toilet partition panels. This brackets base is 1-3/8″ wide x 3-15-16″ long with 3″
center to center hole spacing. The distance from the bottom of the base
to the screw holes on the legs is 2-1/8″. The bracket is made of a
die cast material that is then chrome plated. The bracket sometimes
goes by the name Bathroom Stall (toilet partition) Two Ear Bracket or
Wall Bracket, they can be ordered on Toilet Partition Stalls, Toilet Partition Hardware