This is a copy of a post that I made on the brotherhoodofthering.info forum, 1-28-09.
Back in April I did some testing of these types of clips with some interesting results.
I then contacted the manufacturer, Eagleclaw, and asked what the "Load Rating" was on their "Duo-lock Snaps."
I received a reply from Mr. Steve Schreck of Eagleclaw and he provided the following:
Dear Mr. Arnold,
I have asked our QC Department to look into this matter and they have come back with some data.
They tested various Duo-lock snaps from our inventory.
Size 1 averaged 18lbs.
Size 2 averaged 30lbs.
Size 3 averaged 40lbs.
Size 4 averaged 49lbs.
Size 6 averaged 60lbs.
In some instances where the snap fell below what is normal we did notice a slight variation in the way the large end of the snap attached. I will be working with the vendor to tighten this up.
Regards,
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I would recommend that we use a 5/3 derating on these which is typical for safety applications.
That would make the working ratings:
Size 1 10 lbs.
Size 2 18 lbs.
Size 3 24 lbs.
Size 4 29 lbs.
Size 6 36 lbs.
In the second picture that Larry posted the Snap next to the penny is closed on both ends and the one next to it is open on both ends. You must close the small end first then the big end can be closed. Make up a set of lines and install the Duo-lock clip small end on the line and then you will only have to open the large end to connect your lines. No lost clips.
To see Larry's pictures go to the brotherhoodofthering.info forum.
Clancy