[mmmmpancakes]

The problem with your comparison to Amazon is that the scale of products offered on Amazon is completely different.

A catalogue system like this is only viable if the number of products is relatively small, as appears to be the case of mcmaster-carr.

[stingrae]

McMaster has >700,000 products available on its website so I wouldn’t really call that relatively small.

It is more segmented than what Amazon offers.

[mmmmpancakes]

Amazon has roughly 350 MM products if you account for third party sellers, so yeah, the scale is massively different.

[ckemere]

Maybe a related big difference is that McMaster Carr actually know what they sell?