M42
Encyclopedia
M42 or M-42 may refer to:
In science:
In transportation:
In photography:
In firearms and military equipment:
In manufacturing:
In science:
- Messier 42, a nebula also called the Orion Nebula
- the 42nd known Mersenne primeMersenne primeIn mathematics, a Mersenne number, named after Marin Mersenne , is a positive integer that is one less than a power of two: M_p=2^p-1.\,...
In transportation:
- M-42 (Michigan highway)M-42 (Michigan highway)M-42 is a rural state trunkline highway in the U.S. state of Michigan. It is located in the northwestern Lower Peninsula of the state. Along its route, M-42 begins in Manton and ends north of Lake City, some apart. The highway used to run much farther...
, a state highway in Michigan - M42 motorwayM42 motorwayThe M42 motorway is a major road in England. The motorway runs north east from Bromsgrove in Worcestershire to just south west of Ashby-de-la-Zouch in Leicestershire, passing Redditch, Solihull, the National Exhibition Centre and Tamworth on the way. The section between the M40 and M6 road forms...
, a motorway in the United Kingdom - BMW M42BMW M42The BMW M42 is a DOHC 16-valve I4 piston engine first built for the E30 318is and 318i 1991 year model. The engine block is based on the BMW M40, used on the 318i, but had distinctive features such as double overhead cams driven by a timing chain, hydraulic valve lifters, and an increased 10:1...
, a 1989 automobile piston engine - Grand Central TerminalGrand Central TerminalGrand Central Terminal —often incorrectly called Grand Central Station, or shortened to simply Grand Central—is a terminal station at 42nd Street and Park Avenue in Midtown Manhattan in New York City, United States...
M42, a World War IIWorld War IIWorld War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
era sub-basement and power station beneath New YorkNew YorkNew York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...
's Grand Central Terminal train terminal
In photography:
- M42 lens mountM42 lens mountThe M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch...
, a standard for cameras
In firearms and military equipment:
- M42 DusterM42 DusterThe M42 40 mm Self-Propelled Anti-Aircraft Gun, or "Duster," is an armored light air-defense gun built for the U.S. Army from 1952 until December 1959. Production of this vehicle was performed by the tank division of the General Motors Corporation. It used components from the M41 light tank...
, a United States Army self-propelled anti-aircraft gun - M42 (gas mask), a United States military gas mask
- M/42 (bicycle), a Swedish military bicycle
- 45 mm anti-tank gun M1942 (M-42), a Soviet anti-tank gun
- Duperite M42 helmet, an Australian WWII helmet
- M42 StahlhelmStahlhelmStahlhelm is German for "steel helmet". The Imperial German Army began to replace the traditional boiled-leather Pickelhaube with the Stahlhelm during World War I in 1916...
, a type of German WWII helmet - M42, a Smith & WessonSmith & WessonSmith & Wesson is the largest manufacturer of handguns in the United States. The corporate headquarters is in Springfield, Massachusetts. Founded in 1852, Smith & Wesson's pistols and revolvers have become standard issue to police and armed forces throughout the world...
hammerless revolver - M42 United Defense submachine gun, an American weapon used in World War II
In manufacturing:
- M42 grade of high speed steelHigh speed steelHigh speed steelMost copyeditors today would tend to choose to style the unit adjective high-speed with a hyphen, rendering the full term as high-speed steel, and this styling is not uncommon . However, it is true that in the metalworking industries the styling high speed steel is long-established...
with cobaltCobaltCobalt is a chemical element with symbol Co and atomic number 27. It is found naturally only in chemically combined form. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal....