Part number 519
Manufacture has discontinued this mounting plate and the handle sets it goes to.
You will need to replace your full handle set. To know which style of replacement handle set to order for your door - Identity If your mounting plate uses the "A" screw Holes or "B" Screw Holes and follow to the corresponding links below for instructions and list of the parts you will need:
"A" Screw Holes: Off set Latch needed (Used on Hurd Doors and other brands)
Click Here for Instructions on how to order a Replacement Handle Set
"B" Screw Holes: Center Latch needed (Used on Other Brand Doors)
Click Here for Instruction on how to order a Replacement Handle Set
Mounting Plate Known part Numbers: 011771, P/N 120-60; PAT. # 5,092,144