I've used McMasters for over 25 years, mostly for my employers but i've had some home deliveries too.
They are expensive but you can expect delivery quickly.
They have a lot of items and multiple warehouses but they are not all inclusive. I found items not included in the McMasters catalog (I remember small hose clamps but there were others) in an industrial supplier in Ridgefield, NJ.
A couple of items you should consider if you put in an order with McMasters -
* machine screws for attaching trucks. I got boxes of 100 for about $2.50/box (more now). They are not self cutting like the screws Athearn traditionally provided but I never had any thouble in casting resin if I drilled a pilot hole. * Soft iron wire (smallest size which was .014 inches {14 mils}.1 roll has been a life time supply. The roll I have is uniformerly flat black but larger sizes aren't. This makes nice grab irons. It was perfect for Intermountain SFRD reefers * mold release in aerosol cans for casting
