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| Funk & Wagnalls New Practical Standard Dictionary. Britannica World Language Edition. 1946, 1957. |
Since this 1957 edition, the term "skein screw" has fallen out of usage. I don't know what exactly it was designed for, other than being a very coarse-threaded lag bolt. Interesting also that this diagram included a "saw screw", used to hold the wooden handles on hand saws. Another largely vanished piece of hardware.
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