Model # U 9839

Internet #100159987

Store SO SKU #477357

Prime-Line Keyed Sliding Window Lock


Keyed Sliding Window Lock

$6.90 /each

Frequently Bought Together

Product Overview

The Defender Security Keyed Sliding Window Lock features a key lock for additional security and will secure your window when closed or in a ventilating position.

  • Zinc die-cast construction
  • White painted finish
  • Bolt locks into 1/4 in. hole drilled into fin
  • Securely locks window in closed or ventilating position
  • Key-lock design
  • Easy to install

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Is this ideal for slide up vinyl windows?

I have a 10 year old autistic son who has been escaping his room because the windows are to the floor. He has ripped the screens and moved furniture to escape his room while in trouble. Will this product keep the window from opening upward? As one answered question it can allow a 4 inch opening, which is fine. Thoughts? Answers?
Asked by: TVasboe
Thank you for your inquiry regarding this item from Prime-Line Products. This keyed sliding window lock will prevent a vertical sliding window from opening beyond the distance that it is installed, but it is not designed for vinyl windows. There are other window locking devices that can also be purchased through this same site you may wish to consider which include these model numbers: U-9928, F-2646, U-9933, U-9927 and S-4772. For additional questions regarding this item, or any other product manufactured by Prime-Line Products, please call their toll free number at (877) 649-9740, or contact them by email at
Answered by: primelineProductExpert
Date published: 2016-01-17

Can this lock be placed such that the window can be opened to a certain distance - such as 4"?

Asked by: Billy
Yes it can be installed that way.
Answered by: Kayla
Date published: 2017-05-01

Would I be able to use this on my sliding windows where both windows open?

Would I be able to use this on my sliding windows where both windows open?
Asked by: CatPatC
Yes. The only problem you may run into is the slot maybe to skinny to fit your window tracks.I would suggest the locks that replace the original window locks. They are about the same price.
Answered by: Kayla
Date published: 2017-05-01

can this be used with horizontal opening windows or vertical opening windows?

My windows open up sliding and down sliding. Can this key lock work for up and down windows, not right sliding left sliding windows?
Asked by: kazzman
Both, it just depends on the window track. If the window track is too wide for the slot on the lock it will not work on the windows. If you pull up the lock on line and look at the specs it tells you how wide the slot is on the lock (3/32?). If you buy this lock take care on opening the package in case you need to take the lock back to the store.
Answered by: John
Date published: 2016-01-15
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Customer Reviews

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