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Glossary of Fastener Terminology
G
Gage.
An instrument used in the measuring of the important
measurements of fasteners.
Galling: A severe form of adhesive wear which
occurs during sliding contact of one surface
relative to another. Clumps of one part stick to the
mating part and break away from the surface. (Can
frequently occur when both the nut and bolt are zinc
coated.)
Galvanizing. Galvanizing is the process of
coating metal with zinc by hot dipping, mechanical
deposition, or electrolysis.
Gauge. The thickness of sheet metal or the
diameter of a wire.
Grains. Grains are the individual crystals of
the material.
Grinding. Grinding is the process of removing
material from the surface by the cutting action of a
bonded abrasive wheel.
Grip. In general, the grip of a fastener is
the thickness of material or parts which the
fastener is designed to secure when assembled.
Grip
Length: Total distance between the underside of
the nut to the bearing face of the bolt head;
includes washer, gasket thickness etc.
Ground Thread. A ground thread is a thread
finished on the flanks by a grinding operation.
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