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Printable gauges that you can press-fit hex nuts into and use to check your bolt collection. You could leave bolts in as well and then check both nuts & bolts.
There is a 7.5mm tall recess below each row of openings for fixing labels.
For Imperial, the gauge is designed for the following nuts:
6-32, 8-32, 10-24, 10-32, 1/4"-20
1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24
7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20
For Metric, the gauge is designed for the following nuts:
M2x0.4, m2.5x0.45, M3x0.5, M4x0.7, M5x0.8
M6x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25
Each gauge is less than 100mm wide so they should be printable on just about every printer.
EDIT Jan 23, 2013: Sorry folks. The MetricNutSizeChecker.STL file that was initially uploaded was the wrong version. The correct one is posted now.
EDIT Jan 25, 2013: Information on nut dimensions was obtained from:
I printed mine with 50% fill, 0.4mm width, and 0.25mm layer height. The nuts are a tight press fit and did not require glue.
Imperial & Metric Nut Size Checker / Gauge by CanFire is licensed under the Creative Commons - Attribution - Share Alike license.
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