Machine Design
A bolt of M 24 × 2 means that

The pitch of the thread is 24 mm and depth is 2 mm
The nominal diameter of bolt is 24 mm and pitch is 2 mm
Cross-sectional area of the threads is 24 mm²
The effective diameter of bolt is 24 mm and there are 2 threads per cm

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A stud

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

ANSWER DOWNLOAD EXAMIANS APP