This N connector can be terminated with RG303 or B7806A coax cable by clamp to be N pigtail to transmit plenty of signals in base station.
RG303, Belden B7806A have similar dimensions as RG58, LMR195 coaxial cable, so N plug for RG303 or Belden B7806A is same one as N plug for RG58 cable, and the PN is C27CA38058A03.
Please link N connector plug straight clamp for RG58/LMR195/RG141 to get drawing of C27CA38058A03 for RG303, B7806, RG58 cable.