Bronze bolts with the "infinity" figure 8 symbol

I have marine air horns from Kahlenberg and Cunningham, and both use all bronze bolts and cap screws that have the infinity figure-8 symbol on the heads. Does anyone know the manufacturer of these? I've seen these bolts on horns from 1951 through the mid 1990's, but I can't find the supplier.



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These are silicon bronze fasteners. Availilable from Mcmaster Carr Supply.

Good luck.

Tom Lipton

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