Re: stainless steel bolts

In rec.autos.tech Scott Dorsey <kludge@panix.com> wrote:

Paul in Houston TX  <Paul@Houston.Texas> wrote:

It's difficult to say for sure with out viewing the head markings or
seeing better photos.  It could be the small pixel count of the photo or
the zinc plating, but... the machining just does not look crisp / sharp.
   There are striations on the bolt head and nut that are not seen on
quality bolts and nuts.  The nut appears to be much thinner than a good
quality nut.

 
There are good fasteners, crappy fasteners, and the very worst,
electrician-grade fasteners.
 
Striations are a bad sign and so are threads that aren't cut sharply, or
even worse appear to be rolled rather than cut.

Rolled threads can have some advantages over cut threads. It depends
on the material and the application. They are not always inferior.

https://accu-components.com/us/p/360-rolled-thread-vs-cut-thread-the-differences-benefits-of-each-thread-type

I agree that the fasteners in the photo look like poor quality parts.