Key Specifications, Connector Series 1: MMBX, Connector Gender 1: Plug, Connector Polarity 1: Standard, Connector Angle 1: Straight, Connector Mount Method 1: None, Connector Impedance 1: 50, Connector Series 2: SMA, Connector Gender 2: Female, Connector Polarity 2: Standard, Connector Angle 2: Straight, Connector Mount Method 2: Bulkhead, Connector Impedance 2: 50, RF Cable Part Number: RG178B/U, RF Cable Type: RG178, RF Cable Impedance: 50. Snap-On MMBX Plug to SMA Female Bulkhead Cable Using RG178 Coax. PE3C3984 is a MMBX plug to SMA female bulkhead cable using RG178 coax. This Pasternack MMBX plug to SMA female bulkhead cable assembly uses a 50 Ohm MMBX for connector 1 and a 50 Ohm SMA for connector 2. Our plug MMBX to female SMA bulkhead cable assembly uses a flexible cable type that is 50 Ohm. Pasternack PE3C3984 MMBX plug to SMA female bulkhead cable assembly is constructed with RG178 coax.