Actually, I'm pretty sure I've never seen a McMaster link in any search engine. Even if you google a direct McMaster part number, like "91251A449", McMaster will not be among the results. While the url to that product is just https://www.mcmaster.com/91251A449/
If you have a lot of product pages (millions) it can make sense to not have all of them indexed by a search engine. If you have pages that are more profitable and might hit more keywords than some very specific product SKU it makes sense to index these primarily.
I am not here to shill for Google, but I cannot believe that Google doesn't have a special arrangement with McMaster to index all of their part numbers! The advertising potential is very good. As a related point, I am almost sure they have special handling for programming searches to prefer StackOverflow over other sources. A few times, SO.com has made some incredibly tiny change to their webpages that made them virtually invisible to Google. After some internal email exchanges, SO.com was "fixed", and again, dominated Google programming searches. (Of course, this was 2010s... long before the AI slop era!)
alnwlsn|9 months ago
rbinv|9 months ago
dewey|9 months ago
spookie|9 months ago
Those numbers could be anywhere, on completely unrelated things. They are not a good search query.
throwaway2037|9 months ago
Lammy|9 months ago