This sash lock is for the right side of the unit as viewed from the interior of your home
Andersen TW3862 (Lower Sash) White Exterior and White Interior High Performance LowE4 Glass (1992 to May 2010) Works with 400 Series Tilt-Wash Double-Hung Windows manufactured from 1992 to May 24
Looking at the door from the outside of your home the operating panel would be on the left when door closed
Andersen 16R (14SR) Narroline Sash Balancer - Right Side
Andersen Tribeca Style - Gliding Door Thumb Latch - Stone Color Works with Narroline Gliding
Andersen / EMCO Storm Door Closer Bracket Category_Andersen Roof/Skylight Parts This sash lock is forStorm Door Closer Bracket in White Color Includes one jamb bracket, one door bracket and screws. Available in White, Sandtone, Almond, Forest Green, Terratone, Bronze, Black and Wineberry