Re: Questions on proper bolt selection

["Chris Kent Kantarjiev" <cak@parc.xerox.com>]

The three line marking means SAE grade 5. They should be replaced with
grade 5 bolts, even in seemingly non-critical applications. (Carroll
Smith would tell you not to use them, even in non-critical applications,
but he's used to building race cars).

Stainless steel bolts should be used on boats, and then with a great
deal of caution. They're weak and brittle, if pretty.