N Female to N Female 4 Hole Flange, DC to 11GHz PN: A-NF-NF-489
N Female to N Female Adapter, 4 Hole Flange PN: A-NF-NF-288
N Male to N Female Precision Adapter, 4 Hole Flange PN: P-NM-NF-303
N Female to N Female Precision Adapter, 4 Hole Flange PN: P-NF-NF-179
N Female to N Female Adapter, 4 Hole Flange PN: A-NF-NF-072