j - j is used in engineering and physics to represent i the imaginary number.

Jackbolt - A bolt or screw attached to the baseplate or foundation that is used to move or position the machine that is being
moved.

Jackscrew - A bolt or screw attached to the baseplate or foundation that is used to move or position the machine that is
being moved.

Jarno - A standard taper having 0.600 inch taper per foot used on some machine tools.

Jewellers Screwdriver - A small precision screwdriver.

Joint - Interface between two parts.

Joist - Horizontal wood framing member set from wall to wall to support the boards of a floor or ceiling.

Jominy Test - Used for determining end-quench hardenability.

Joule - A unit of work, energy, or heat

Jury rig - Any makeshift device or apparatus rigged as a substitute for regular gear. Also used as a verb.
Engineering Glossary, Engineering Dictionary J
A  B  C  D  E  F  G  H  I  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
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