Cross mount clearinghouse

There are many keycap mounts that look very similar to Cherry MX mount, but have incompatible dimensions. They will not take Cherry MX keycaps. Such mounts include those of Cherry M6 and Cherry M7 switches.

Dimensions of known cross mounts are given below. Add the dimensions of other cross mount switches to the table below. All figures to be considered approximate unless reported as authoritative.

Mount/switch	Width	Depth	Stem height	X arm width	Y arm width	Authoritative	Notes
Cherry MX mount	4 mm	4 mm	3.7 mm	1.25–1.30 mm	1.05–1.10 mm	No
Alps integrated dome	5 mm	4.5 mm	—	1.2 mm	1.2 mm	No
Futaba MD series	0.158″ (4.0 mm)	0.188″ (4.8 mm)	0.165″ (4.2 mm)	0.47″ (1.2 mm)	0.47″ (1.2 mm)	Yes	Futaba ML series has the same cross-section dimensions as MD series, but the keystem height is not given in the specification; for GRI KBR the keystem depth is 0.160″
SMK inverse cross mount	3.9 mm	5 mm	4.5 mm	1.2 mm	1.35 mm	No	Stem is deeper than the switch travel, of 3.8 mm
MEI WEAB	4.8 mm	4.8 mm	9.4 mm	1.2–1.3 mm	1.2–1.3 mm	No