Ok, I grabbed both parts and it looks the part # 10 and #11 are backwards on all the fiche. 45131-166-016 is the steel pin as seen here
In summary, if you need the rubber piece its 45132-166-016, bush, pin- which is a better description. Same part IS vs STD.
You have saved me from ordering the wrong part.

I hate it when they mess the fiche's up.
Same here ... BIG TIME!

No, I don't have a complete parts locker here

, I order a years worth of maintenance part from HDL to get the free shipping and pick it up at a maildrop in the US. Last time I changed the rear brake pads, I noticed some pitting on the pins and ordered parts so I can do a rebuild next time I change the pads.
I usually hoard all of my maintenance parts but got caught this time. While trying to change the front pads, I realized that one of the caliper hanger pins (#16) was frozen solid (although I always put antiseize on these threads). Long story short ... placed caliper in a vise and heated with torch. Nothing accomplished other than burning the seals, etc ...

I then drilled through the head of the pin before using an easy out to remove it. What a PIA LOL!!!
Thanks!