TNCA Female to TNCA Female Precision Adapter, 4 Hole Flange PN: P-TNCAF-TNCAF-301
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