The purposes of the bulkhead are to:

• Enable the connector to serve as a mounting device, such as to mount the cable to an enclosure, case or Printed Circuit Board (PCD).
• Weatherproofing: Seal the hole where the connector is mounted, by placing an O-ring between the wall of the enclosure and the O-ring.

The bulkhead does not in any way interfere with the ability of a female connector to properly "mate" with a male connector: In other words, a female connector with a bulkhead mates/connects exactly as well as a female connector without a bulkhead.

The bulkhead set for $0.15 includes one nut and one washer.

Rubber waterproof O-ring seal can be purchased by checking the checkbox above or purchase as a standalone item.