I think the stereotypical female experience is wanting to see the breadth of items available, and maybe "oh wouldn't this go nicely with that thing you bought?" I really don't think the stereotype is true, though. I LOVE browsing McMaster with no specific items in mind, and would not at be mad about "you just bought 1/4-20 18-8 stainless steel screws. here are nuts."

All in all, I'd say to be careful with stereotypes. I'm sure women love the McMaster-Carr shopping experience.