Carriage Bolts.

[bcp]

Here's a possible answer from 1922.

Bruce

 

[Fuddy1952]

Here's a possible answer from 1922.

View attachment 580862



Bruce

That's an amazing tool. You could modify an old pair of cutters like that. Interesting.

 

[Mace Canute]

spring for stainless carriage bolt assembly(s)

Or use much less expensive hot dipped galvanized ones...(and NOT the plated ones).