Lock is all plastic/ latch is metal

Hi there!

Thanks for reaching out to us. Your sash lock resembles the 90-005. This measures 2-1/4" on the installation hole centers with a 3/8" backset so you'll want to make sure your lock is the same.

As for the tilt latch, can you write out the distance between the two installation holes, measured from center to center? We'd also like you to write out the back set which is measured as shown below in red. 

Alternate image for 90-005