question on W2 heads

I can't tell you how many places I haunted trying to get the socket head bolts for my plates when I installed them. Big box stores, mom & pop hardware stores, parts stores & the best was Fastenal, they wouldn't break a package, wanted to sell me 200 of them. LOL That's why mbaird & I struck a deal on the ones he has, so I will have a "few" extras.
Online, try McMaster-Carr or Bolt Depot next time.
I won't use Fastenal after the local store refused to sell me anything unless I had a $25 minimum even if it was instock in that store. I told them they just lost $10k a year in what I would order from them for my company and the idiot didn't even blink. Said it was too expensive to process small transactions, as he and the other guy stood around alone all day.