Model # U 9823

Internet #100577469

Store SKU #140872

Prime-Line Aluminum Secondary Window Locks (4-Pack)


Aluminum Secondary Window Locks (4-Pack)

$374 /each

Frequently Bought Together

Product Overview

These Defender Security Secondary Window Locks (4-Pack) secure your window in an open, ventilating position. The locks will fit rails up to 1/8 in. wide. The lock comes in brilliant white. Extruded aluminum lock with steel thumbscrew used on metal horizontal sliding windows. For heavier-duty locks see item no’s U-9800, U-9802, U-11127, U-11128, U-9810 or U-9812. Finish by tightening thumbscrew with pliers to securely lock windows in closed or ventilating positions. For non-marring locks see no’s U-9820, U-9821, U-10876 and U-10551. For vinyl windows use U-9809 or U-10547.

  • Fits rails up to 1/8 in. thick
  • Aluminum construction with white finish
  • Allows window to lock in ventilating position
  • Secondary lock
  • Easy to install

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.




Warranty / Certifications

More Products With These Features


Customer Questions & Answers

what is the dimension of the opening

what is the dimension of the opening
Asked by: parred
Thank you for your inquiry regarding this item from Prime-Line Products. This item measures 1 inch wide, by 7/16 inches tall and it will fit on up to 1/4 inch thick rails. 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: 2017-01-25
  • y_2017, m_6, d_23, h_1CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_1
  • loc_, sid_100577469, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 96ms

Customer Reviews

Aluminum Secondary Window Locks (4-Pack) is rated 3.3 out of 5 by 3.
Rated 5 out of 5 by from It does what it's intended to do I have some "insecure" storm windows in my sun room that someone was able to push in slightly to get them open by knocking the lock out of the track to get into my home. I am using these to help secure the windows in place. I used similar clamps in a house I rented a few years back for added security on cheap windows that could easily be pushed in far enough for the "default lock" to be defeated. These keep the window from then being slid open once the built in lock's been knocked out of it's track. They're nice for a little added security, especially for the price, it doesn't make sense not to have them. But I don't think they really replace quality locks on quality windows in the long run. :)
Date published: 2012-04-17
Rated 4 out of 5 by from Matches most windows, ez on and off EZ on and off. Matches white alum windows. The average builder's home window is rather cheap so it is what it is!
Date published: 2009-08-27
Rated 1 out of 5 by from Don't buy Cannot use it, got struck with the paint. Need to return them.
Date published: 2016-05-17
  • y_2017, m_6, d_23, h_8
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_3
  • loc_, sid_100577469, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 96ms