[yarddog]

I once met a guy who sold nuts and bolts.

We discussed them for maybe a couple of hours. The markings, quality, the ones used for extreme duty etc. Far more interesting than one might think.

Unfortunately that was over 40 years ago and I don’t remember much. I do remember he said there are a lot of injuries caused by people replacing the nut which holds lawn mower blades on. He said they sometimes just use mild steel nuts or bolts or whatever they are.

[Gamecock]

I do remember he said there are a lot of injuries caused by people replacing the nut which holds lawn mower blades on. He said they sometimes just use mild steel nuts or bolts or whatever they are.

That information alone made FR worth reading today.

[Cobra64]

ASTM specs.

[Lurker]

I was in that business for about a decade. Structural grade bolts are subject to stringent requirements. In fact about 20 years ago cheap Chinese counterfeit bolts were the cause of a collapse in a shopping mall in St Louis IIRC.

Selling counterfeit or mismarked fasteners is now a Federal crime.