Bizarre customer service. Checkout procedure on website doesn't provide a shipping quote. Received an email requesting additional information for shipping. Provided information and asked how much for shipping, got a reply back from someone else saying the order is cancelled due to non payment...

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.

Find anything. Have it at your door in 2 days. Industrial supplier for just about any mech/engineering/mfg part in the world. Prices reflect quality parts, not cheap imports. I can be reassured that I'm getting a genuine part that will hold up to engineering specs (for example- fasteners are excellent quality and hold exact tolerances, no cheap big-box import stuff). Everything is easy to find, orders can be split up by PO or job type. Fulfillment/Shipping is an example of how pefect a system can run. I've made hundreds of orders and NEVER had a mistake or quality issue. Not the cheapest by any means, but my timeline and sanity are worth the tiny extra 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!

Great Customer Service I buy alot of stuff from McMaster Carr with me being a maintenance manager. Almost everything I order is delivered by the next morning. I have always received quality items. Today I received one wrong item in my order. When I emailed their customer service I received a reply within 10 minutes. I was told to keep the wrong item and they would ship the correct item for the next morning delivery. Anyone else would've wanted pictures of the wrong item in the package and days if not weeks of time before a reply.