Intrachain interactions


I have a question regarding the intrachain interaction in LAMMPS. Currently i have a system made of multiple chains and each chain is modeled using the beads and the spring model. In my simulation i want to switch off the intrachain interactions up to the 6 nearest neighbor. How can it be done. I know that it can be switched off up to the third nearest neighbor using the special bonds commands however i want it to the 6 nearest neighbor.