NMEA 2000 Through Bulkhead Adaptor 

NMEA2000 Wall Duct micro-c
Micro Bulkhead Feed-Thru
Micro Bulkhead Feed Through  
Micro Bulkhead Feed Thru Fitting
Bulkhead Feed-Thru-NMEA2000 Mini-C
NMEA 2000 Through Bulkhead Connector

  NMEA2000 Micro Network Connectors Bulkhead Feed Through 

The Bulkhead Feed-Thru allows new connection point in a network installation. It creates positive alignment of connection when use thru panels or bulkheads.

Micro Bulkhead Feed-Thru connector allows ease of installation through panels or bulkheads and establishes future connection points in a network installation. The bulkhead feed-thru also maintains the integrity of watertight bulkheads by providing a waterproof seal and connection, Features rugged keyways for positive alignment of connections, Waterproof rated to IP67.