Metric screw measuring device - M2/2.5/3/4/5 4-50mm

prusaprinters

Note: For a larger version that covers M3-M10 sizes up to 100mm, see my Bike Scruler. For a version of that with metal inserts for the M3-M6 sizes and magnets, see my Etsy store.Quickly sort and measure metric screws and bolts in sizes ranging from M2, M2.5, M3, M4, or M5 with lengths from 4mm to 50mm. Screw diameter sizing is a simple go/no-go clearance check which is faster than threading in a screw. Note that this doesn't tell you anything about screw pitch, but all of my metric stuff is standard coarse thread so I'm okay with this. If you want to confirm the exact thread, check out sneaks' original design with threaded inserts or check out registeredthing's remix with nuts as inserts.Update 28 Feb 2020: Per a request I have uploaded a version with no keychain loop or back text. This is available under Metric screw measuring device-sanitized.stl in the Thing files. Seems like some people really take issue with giving credit to the folks who provided them with that free thing.Update 1 Oct 2023: Realized that the sanitized version was oriented wrong and would load “sideways”, so fixed the orientation and re-uploaded.Note about standard lengthsI've gotten several comments about the ISO standard lengths and how it goes up in 5mm increments past 20mm and so forth, and several requests to redo this with the standard lengths. There are already several remixes which have done exactly that. The problem is not every bolt and screw complies with standards. I have right here an M8x22, an M6x15, and an M4x13. If I had the markings on the "standard" lengths, it would be difficult to determine the exact length of those. Because of this, I have no plans to change Sneak's excellent original design and don't find it that hard to read. If you are certain you'll always deal with bolts which conform to the standards, then check out the remixes.Print instructionsJust about any print settings will work. I've printed this in 0.3mm draft mode with only 2 shells and 20% infill and it has worked just fine. You can print with a finer layer height, but the threaded holes will still need to be cleaned up after printing. I keep metric taps on hand for this task, but if you have scrap screws and a Dremel, you can cut lengthwise notches in their threads to make simple thread chasers that work quite well.Bambu Labs Knockoff:I got a Bambu Labs X1 Carbon printer, and it came preloaded with several example files. I was very amused to discover that they had knocked off this design pretty accurately with one of the sample files, but I haven't seen any credit given anywhere, which they're pretty notorious for, having done that with Bambu Studio (stealing from Prusa Slicer without credit until they were called out) and now apparently with their new competitor to Printables that looks to be a straight up copy.To be fair the Bambu version is obviously redrawn from scratch, but it's super hard to look at the two side by side and not realize there are some shocking similarities at play.Weird crap like this is why I've only got one Bambu Lab printer, and while there are many things I really do love about it, sketchy stuff like this just doesn't sit right with me.