As far as MRO suppliers go they are the best! As far as MRO suppliers go they are the best! Pricing is usually in line with other MRO suppliers & their online catalog is easy to use & find items. They don't tell you in the catalog what brand you are getting (unless you can identify by the picture) but usually it is a trustworthy name brand. I would say Grainger & MSC are their biggest competitors. Would advise to avoid Grainger, I deal with them on a weekly basis because my company pushes us to use them - their prices are way high, sometimes double! Their website is terrible!. I don't use MSC very often but I would say they are very similar to McMaster.

Shipping Cost Surprise - Huge! I recently placed a small order - just over $20 - with McMaster-Carr. During the order process I was not able to see, or even estimate, the shipping cost. All I got on the order page was "shipping and tax will be added." OK, I figured, I'll take a chance. 24 hours later, my shipment was in the mail and I finally got a receipt showing the shipping (and tax) amount. Turns out the shipping was more than 40% of the total order, making it substantially less competitive with other suppliers. My advice: (1) shop around. (2) If you MUST buy from McMaster-Carr, don't press "buy" until you know the shipping cost.

McMaster-Carr is fantastic! I've been using McMaster-Carr for years. They always have the bolts and other hardware that no one else has. They also have very good pdfs with dimensions as well as CAD renderings. These are very important when your building prototypes and trying to figure out what may or may not work on a one off project. The best part is you get them either the next day or the following. Highly recommend!

Best source to quickly find hardware and other supplies. Freaky fast shipping too!!! I use McMaster-Carr primarily for automotive needs. Using their web site is super easy by far the best site to quickly get to what you are looking for with no fluff or "offers" to interrupt navigating your way around. Finding hardware and electrical supplies is a breeze. I highly recommend using them if you are in the SouthEast. Most everything I have ordered literally shows up the next day even though I didn't select next day shipping. They may not always have the best price but the quality of goods combined with showing up the next day wins in my book. No one at McMaster-Carr asked for this review. I just felt I needed to share with others how awesome they are to work with.

McMaster Carr believes Australia is a… McMaster Carr believes Australia is a dangerous destination. McMaster Carr decided that a 5mm nut driver and other hand tools are strategic items. That they are prohibited from shipping to Australia. They have gone mad or very lazy. They can not fill in a CN22 probably less than 10 words.