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

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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
original design with threaded inserts
or check out
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.

Created by cmh in

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