Hexagon socket bolt

First things first, the case these fasteners arrived in is one of the worst plastic organisers I’ve had the displeasure to use. I just about had to snap the latches off on this to get the thing open, which is going to be a real pain trying to open it in a hurry to grab something I need for a project. I really shouldn’t have to grab a flathead screwdriver to open a plastic organiser box. I’m all for a sturdy container that closes tightly and keeps things in the right spots but this is absurd. These will get transferred to another box but it isn't an exaggeration to say that even some ziplock bags would be an improvement. These fasteners match the ones I buy from dedicated fastener supply stores, which is to say they’re fairly high quality. I go through a massive amount of M3 fasteners in my 3D printed projects and machines and the sizes of screws in this set are always the ones I'm replacing as they get used often. No issues or problems have shown up yet, although I've only used about a dozen of them so far. If I run into any problems with them corroding or snapping etc, I'll be sure to revisit the review. The number of screws in the box is exactly the quoted amount. I didn’t want to bother manually counting 150 m3 hex nuts so I weighed them and there are at least 150 or more included according to my precision scales. All the lengths measured at the dimensions advertised and not a single screw had any bad threads, sharp edges or malformed sockets from what I noticed during the counting of the contents. They all are well-made and I don't expect to have any issues with them stripping out or being difficult to thread into anything at all. The hex sockets on the heads are also produced to an excellent tolerance, all the 2.5 mm Allen keys I've used fit well. I tested them with both a Wera plus Allen key set and cheaper generic ones using both straight & ball ends. I can't complain about the pricing on this set and I appreciate that it includes a bunch of the most useful sizes of M3 bolts. The fasteners themselves are excellent, but the plastic box lets down an otherwise 5-star set of screws.

Good set of M3 hex nuts and bolts. If you're into 3d printing M3 seems to be the size most used in designs to construct. Good selection of lengths and come in a handy dandy case with a reference card for sizes.