regarding bltlength of same spec and same dia of blt and different number of bolts

hi i have the doubt in the new blting methd,

in my 300# spec  for 3", 4", 6" bolt dia is smae but number of bolts is different,
when i give the extra length in sbol for the length of the 3" is ok remaning 4" and 6" is wrong.
hw t give the extra length for the same bolt dia and different number of bolts

hi i have the doubt in the new blting methd,

in my 300# spec  for 3", 4", 6" bolt dia is smae but number of bolts is different,
when i give the extra length in sbol for the length of the 3" is ok remaning 4" and 6" is wrong.
hw t give the extra length for the same bolt dia and different number of bolts