120 Degree
180 Degree
270 Degree
360 Degree
0.96
0.97
0.98
0.99
co-axial
perpendicular
parallel
none of these
threads for the nut at one end and head at the other end
head at one end and the other end fits into a tapped hole of one of the parts to be fastened
threads at both ends
pointed threads
mild steel
aluminium
brass
cast iron