Hi Jmrcowboy. I see that's your first and second posts at TreasureNet. So I'll say, welcome to T-Net's "What Is It? forum, the best place on the internet to get unknown objects CORRECTLY identified.
Here is absolute proof of the (brass) tent-rope adjuster ID given to you by Tony in SC. One of the attachments below shows the original 1880 US Patent diagram for inventor H.B. Thompson's tent-rope adjuster, which he calls a "tent-slip." Another attachment shows an example of your brass tent-rope adjuster which was marked with Thompson's US Patent date, Nov. 30, 1880. The other attached scan shows the original US Army Quartermaster's 1889 order which officially adopted Thompson's tent-slip for service in the army.
Those documents are also absolute proof that it is NOT from the civil war, despite what many Ebay sellers have claimed.
You now see what I mean when I said the What Is It? forum is "the best place on the internet to get unknown objects CORRECTLY identified." I hope you'll read this forum regularly... you can learn a vast amount of ACCURATE relic-ID info here, for free. I did.