Egad, I have a ton of ancient screws in my cellar from the previous owner (NB we have lived here since '95; the previous owners were here for 42 years and the house was built in 1896 or 1897 or 1914 -- depends on who you talk to) which are in about the same shape as those screws.Apparently flathead screws are beyond 23rd century tech.
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You think I can become a contributor if I send over the old screws (there are nails and some spiderwebs mixed in there for free) in a pair of coffee cans?