Used original Chevy/GMC air filter housing plastic wing nut.  These are commonly seen on GM vehicles with the 5.7L and 4.3L engines from 1987-1996.  Black plastic wing nut, with metal thread insert, threads are metric (6mm).

I ship all parts in one day, and often the same day if the order is received soon enough.  If you see a longer ship time listed, I am out on a Jeeping trip and will mail your item(s) as soon as I get home.

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