0.33
0.4
0.5
0.55
same
1-Feb
1-Mar
2-Mar
0.25
0.45(r) 0.55
0.75
d
increases markedly
decreases markedly
remains same
depends on heat treatment carried out
has a head on one end and a nut fitted to the other
has head at one end and other end fits into a tapped hole in the other part to be joined
has both the ends threaded
is provided with pointed threads