This is normal. Double with this available quantity or pair with thicker shims. I've seen and run hundreds of these over the years, on 1/4" input/output jacks, coax connections, etc. I've never seen them, but I imagine the cost would be twenty times what the NASA stress test ratings for sheer tolerance in the cold vacuum of space, surpassing resistance to micrometeors and solar radiation Nuts and washers I've seen Doing this simple job for little money, and 100's of it, is the value here.
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