Help Identifying all parts - ordered from swisco

A quick learner from chicago says:
I need help finding out which part of yours these 4 pieces are. Please help!
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Tom from SWISCO responded:

Sure, I think we can help. The pin and slider look like our 21-084 and 21-112, respectively. I'm not sure about the other two parts. Could there be more to them? I feel like they may just be individual components of a larger assembly.

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