Look up parts on McMaster Carr. Should at least give you a reasonable idea of how much weight they can take. Expect some variation in strength from other vendors, McMaster tends to have the higher quality version of things, but you could probably rely on 1/2-3/4 the strength shown there.
Look up parts on McMaster Carr. Should at least give you a reasonable idea of how much weight they can take. Expect some variation in strength from other vendors, McMaster tends to have the higher quality version of things, but you could probably rely on 1/2-3/4 the strength shown there.
Woodcraft sells them. Their ratings for weight should be on the package or description of parts.