The original corner swivel I removed is horizontally 3/16 wide x 3/16 deep and 1 1/4 long to the swivel. The vertical is 1/8 thick and Looks to be 3/16 wide. It does not appear to be offset, although the two sides are slightly different at the swivel. The number 400 is stamped on one side.
I assume the non swivel corners are a similar design, and need to replace those as well.
Please let me know what replacement parts you recommend.
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