DICTIONARY

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- G -


Gage -
(1) Arbitrary standard for thickness or diameter of sheet metal or wire stock. (2) A measuring instrument.
Gage Diameter -
Gage Length -
Inmechanical testing, the original length of that portion of the test specimen over which strain, change of length, change of area and other characteristics are measured.
Gage Protrusion -
A dimension for the control of flush head configuration. Gage protrusion is stated as the distance from the top of the head to a gage block with a hole of specified diameter (gage diameter) when the fastener is placed in the block.
Galling -
Developing a condition on the rubbing surface of one or both mating parts where excessive friction between high spots results in localized welding with subsequent cracking, flaking and roughening of the surface.
Galvanic Corrosion -
See Corrosion
Grain -
An individual crystal in a polycrystalline metal or alloy.
Grain Growth -
An increase in the size of grains, usually as a result of heating, i.e., a combining of metal grains to make fewer grains of larger size.
Grain Size Number -
A term used to define relative grain size in a metal or alloy and based on the number of grains per unit area. Expressed as numerical indexes where the smaller the number the larger the grain.
Grain Structure -
Inmetallurgy, the form of the grains found in all metals and alloys and characterized by variation in their external shape. The appearance of the arrangement of these grains is called the grain structure.
Grip -
The linear measurement of a fastener which corresponds to the thickness of material which that fastener is capable of joining.
Grip Accommodation -
The allowable variation of material thickness in which a specific fastener can function.


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