7 mm may refer to:
Rail transport modelling
*
7 mm scale
7 mm scale, also known as British 0 scale is a model railway scale of 1:43.5 (or 7 mm to 1 ft; hence its name). The scale is thus different from O scale, American 0 scale (1:48) and O scale, European 0 scale (1:45) For standard ga ...
, 1:43.5 scale with rails apart, representing standard gauge
*
HOn2 gauge
H0f gauge (or H0i gauge) is a rail transport modelling scale representing Feldbahn-style 2 ft and 600 mm gauge railways using 1:87 HO scale running on Z gauge track. The ' NEM 010 specification defines H0f for modelling gauges , as part of the ...
, 1:87.1 scale with rails apart, representing narrow gauge
Firearms
*
7 mm caliber
This is a list of firearm cartridges which have bullets in the caliber range.
*''Length'' refers to the cartridge case
Case or CASE may refer to:
Containers
* Case (goods), a package of related merchandise
* Cartridge case or casing, a fir ...
, bullet cartridges used in guns
{{Letter-Number Combination Disambiguation