75 Ohm BNC Bulkhead Jack — Specs and Fit
Rated to 12 GHz, this jack handles well beyond baseband video frequencies, so it also suits RF distribution and instrumentation links that stay within the 75 Ohm path.
Mounts through a panel hole and secures with the front-side nut — you tighten from outside the enclosure, handy when the back side is inaccessible. Shield termination and center contact are both solder. Single port, panel mount with through-hole solder posts for the shield.
The 031-70577-12G shares the same 75 Ohm, 12 GHz, bulkhead solder termination, and gold center contact — but its center contact material is listed as brass rather than phosphor bronze. The 031-70578-12G adds an isolated feature, which may matter if you need the connector body electrically isolated from the panel. The 031-70573-12G is a crimp termination version for cable (Belden 4505P), not solder. For a BOM that calls for a solder-bulkhead 75 Ohm BNC jack, the 031-70576-12G is the standard phosphor bronze contact variant.