Pasternack 50 Ohm N Female Jack, bulkhead mount. In original packaging, with all hardware. Mounts in a .380" full round opening (no keyway). 0.10" max panel thickness.
Note: These are the earlier (Pre-2006) version of the 4488 using the full round mounting. Pasternack has changed the mounting to a "D" shaped mounting. All other specs match the current production.