Machine Design
When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as

Angular bevel gears
Miter gears
Internal bevel gears
Crown bevel gears

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Machine Design
A stud

Has head at one end and other end fits into a tapped hole in the other part to be joined
Has a head on one end and a nut fitted to the other
Has both the ends threaded
Has pointed threads

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