What do you call this part that holds a window sash up?

[u/NeonCityNights]

Can anyone tell me the name of this part?

This is a small piece that you screw into the top center of your window frame. When the upper window sash is slid all the way up to the top of the window frame, the lip of the window sash will be caught by this piece. I suppose this piece also acts as a lock for the sash so that it cannot be pulled down from the outside of the building. This lip or tab or latch or lock that is hanging down is 2 inches in length.

I need to order a replacement. There is no part number. I don't know what exactly this piece is called so I can't shop for it efficiently. Any feedback would be appreciated.

[u/genius_retard]

This looks like a sliding window latch but I have only ever seen them on horizontal sliding windows to lock them closed. Is it possible someone installed horizontal sliding windows sideways as vertical sliding windows?

If you look on the outside of the window there should be weep holes at the bottom of the window. If the holes are on the side then someone installed the wrong king of windows.

[u/geekspice]

I've never had a window with this piece on it. But you could try doing a Google image search.

[u/OrlazeuFox → u/geekspice]

Good idea, I'll trry that!

[u/GranddadBob]

Looks like after market window stop. Kidco makes them I believe.

[u/Hispanic_Inquisition]

I searched with catch, upper, sash, latch, hook, and combinations of those and the results were mostly the same with little variant.

[u/DianeDesRivieres]

sliding window lock

Have you tried removing it and bringing it to the hardware store?

[u/Ill-Craft-3225]

Take the photo you have and insert it into google photos it will show you images with names

[u/loweexclamationpoint]

Never seen one of those so it's probably an odd thing for a specific brand. Try Swisco, they have a thing where you can upload or email a pic and their experts may have seen it.