Metric Standard hex bolt knobs. There are two variants, and between those variants there are two standards.

DIN93X (DIN932|DIN933|DIN934) contains a lip to grip onto the underside of the bolt. This is the "Legacy" Metric system

ISO403X(ISO4032|ISO4033|ISO4034|ISO4036) Does NOT contain a lip on the bolt entrance. This is to allow clearance for longer bolts defined by the modern 4034 and 4032 ISO standards.

Both should be compatible with each other, although fitment may be tight or loose.

Print the desired set (Full size or Mini) and scale according to this scale factor. For those who want enormous knobs... included are the individual knobs for M20+ sizes. SCALE FACTOR:

M1 - 0.25 M1.2 - 0.28 M1.4 - 0.31 M1.6 - 0.33 M2 - 0.4 M2.5 - 0.5 M2.6 - 0.5 M3 - 0.55 M4 - 0.7 M5 - 0.80 M6 - 1.00 M8 - 1.30 M10 (15mm) - 1.50 M10 (16mm) - 1.60 M12 - 1.81 M14 - 2.10 M16 - 2.40 M20 - 3.00 M24 - 3.60 M30 - 4.60 M36 - 5.50 M42 - 6.50 M48 - 7.50 M56 - 8.50 M64 - 9.50 M72 - 10.5 M80 - 11.5 M90 - 13.0 M100 - 14.0

01-19-2023: Revision -Mini Din 93X - normalized scaling error