SungMi 4 Pack 3" Heavy Duty Caster Wheels Polyurethane PU Swivel Casters with 360 Degree Threaded Stem 800lb Total Capacity for Set of 4 Red (4 without Brakes) Nuts Include SM-AMS-230007

I'll be honest, I'm quite skeptical when it comes to ordering things online in general when we can't actually place our hands on it and feel and see visually ourselves, albeit Amazon, Ebay, where ever. I'm writing this to let others know that from my experience with this particular caster wheel set, it was way better than I thought it would be quality wise. Not very often we get more than we expect when it comes to spending our money but SungMi gave a great caster wheel set with great quality. They also included ALL the hardware I needed which was a blessing for me so read the rest of the reviews before you buy ANYTHING but, from my experience I rate this 5 stars. It came with all hardware, the quality is amazing, it works for the custom application I used it on(which was a creeper that I wanted to upgrade to better wheels) and it worked out far better than I thought it would have and that is all I Can say. Great product, great company, great quality from my experience👍💯

The first picture is my engine transmission stand. 200 pound capacity per wheel, 2 boxes of four, 1600 pound capacity. My engine and transmission together weight 450 pounds, so I should be safe if my welds hold up :)The nuts supplied are nylon lock nuts. When used on 1" square tube in the appropriate sized (12 MM) hole, they barely go on by hand with two threads and do not reach the nylon lock ring. No special tool is needed to hold the nut, finger tight is good enough to get it started, and then put a wrench (or in my case, an air hammer) and tighten it down.Careful not to bend the tube :) but, even with force, the nylon portion of the nut is not reached. You can see in the second picture that fact. This picture was taken after using the air hammer on it.1" square tube is a vary popular application for things requiring wheels. This shaft should be longer.I still give them a five star.Edited: added third picture of the finished project :)

I saw another review that stated these were 3/8" stem. (THEY ARE NOT 3/8"). They have 12mm threaded stem which I found out upon receiving and trying to fit them onto my wire shelving. My shelving and in fact most shelving requires 3/8" x 16 tpi (threads per inch). My bad for not reading the description more closely.They are good casters and have a non marring rubberized polyethylene wheel. I will keep them for another project where they can be attached using the included nuts. Just don't make the same mistake I did. Be aware that these have metric threads and they will NOT screw directly into wire shelving.UPDATE:Since the nut fits inside the pole I end up removing the threaded end caps from the poles and drilling them out with 15/32 drill bit. Then attached the casters to the end caps with the provided lock nuts. Once tightened the stem was just long enough to sit flush with the top of the nut. Then I threaded the entire assembly back onto the poles.

it may hold 200lbs but the bearing will not be perpendicular. upper bearing ring needs to be beefed up.

I replaced my creeper's cheap casters with these and they work very well. I wish the threaded end was a little longer, but it worked for my application.

I was looking for a set of casters that would allow my table saw stand to sit closer to the floor. These had the correct dimensions I needed at fit perfectly. All I had to do was increase the hole diameter for mounting and it was done. Just be aware you will need a thin 16mm tappet wrench to hold the spindle.

I use a stool to work at different stations. I constantly roll back and forth. I have tried 5 brands and these are the best. They swivel the best. Easiest to move sideways

Met my expectations