tilt window lock

A quick learner from Atco, NJ says:
I need 6 pairs of these for a customer in Marlton, NJ. Also attached are photos of the spiral lift rod. It had a plastic cover on it originally, but it is falling apart. The overall length from the blue tip to the end of the rod is 27 3/8" The width of the metal portion of the rod is 7/16". I beleive I need the 3/8" style, but please confirm. I can send additional window lock pictures if necessary. Thanks, Alan
User submitted photo of window latch and spiral balance.
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Mike from SWISCO responded:
Thank you for posting and submitting your photos.

We'll get started with your spiral window balance. The original plastic cover you mention, do you have that nearby? If so, be sure to measure the diameter of of the cover (tube), as this will determine whether it is a 600 Series (5/8"), or a 900 Series (3/8"). Also, if you can, measure the length of the tube portion of your balance.

My initial reaction is that you will need a S600-27 (with blue tip option), however let's make sure we have the correct measurements before we proceed.

The latches shown above look similar to the 26-243 LH and the 26-244 RH latches. Take a look at the nose of the latch (the part that retracts in and out of the casing). Does this look similar to your original?
A contractor from Atco, NJ says:
The length of the tube excluding the blue tip is approximately 27". The plastic cover diameter on the spiral window balance measures 1/2". The covers are severely deteriorated. The plastic cover is similar to the metal cover that your units have. They are very brittle and have crumbled. The space in the track measures 1/2" as well, so I believe the smaller diameter spiral balance is probably the one I need. I don't think the larger diameter one will fit in the track. The locks look correct, but you should be able to tell better since you have all of the views on the new ones. There aren't enough pictures on your site for me to determine which is correct. Thanks!
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Mike from SWISCO responded:
If you're balance cover measures 1/2", it is most likely a Series 600 balance (which measures 5/8"). Please take a look at the Spiral Balances for Tilt Windows guide.

As for your latches, the 26-243 and 26-244 appear to be the closest match online. Compare the nose of the latch (the part that retracts in and out of the casing) to our product pictures. I cannot see the nose of your latch in your photos.
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