Is 697,200 circular mils as big as a Nailhead?
It's about four-and-a-half times as big as a Nailhead
The size of a Nailhead is about 153,400 circular mils.
(for 11-gauge wire nai)
An 11-gauge nailhead measures 153,400 circular mils. Nails have been used since ancient times; archaeologists have discovered Ancient Egyptian nails that are over 5,000 years old.
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