Huge variety, reasonable price, great customer service They have a huge variety of hardware for my needs. Price is very reasonable too. I placed an order on Monday, it was supposed to be delivered on Wednesday but UPS lost the package. I called McMaster customer service and they got me sorted out immediately. Would buy from them again.

Tall tree standing in a briar patch. I have been in business about 27 years now. I am in the process of closing my place due to health reasons. I have bought from McMaster the whole time. Not once have they given me reason to complain. Their telephone staff is run by fine Southern (polite) people, which are still there despite having a well-working website. Yes, their prices may be a bit higher because you are getting industrial-quality goods and not the junk you find at your local big box. Finally, go to your local favorite and ask for a 3/16" transfer punch. See if they even know what it is. Then see if they will sell it to you individually for a couple of bucks. McMaster will.

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!