Bought a place out and you can see that we got thousands of these circlips. Selling them in lots of 100 per listing. Couldn't find the exact same ones on the internet but did determine that some places called them inside circlips and other places call them housing circlips. Determine it's 2 in because I used a Vernier caliper and it measures 1.984 in outside diameter. They measure .058 in thick.

 These are new but they've been sitting in a warehouse for decades as you can see from the boxes are pretty beat up. The circlips themselves may need some cleaning but they are predominantly and some type of oil so they didn't get too rusted.