broken casement lock

Thanks for posting.Take a look at our 38-095, 38-096, the 38-138 or the 38-139. See which of these four items most closely matches your old lock. Compare the dimensions listed on our product pages, particularly the distance between the lip of the housing (not starting from the 'outer' bottom of the base!) to the end of the prongs. For example, in the picture below of the 38-096, this dimension is 1-7/8". Let us know if one of these corresponds closely with your old part. 

Side view of 38-096