Bulkhead Passthrough Fittings

Passthrough fittings allow simple, clean line routing through bulkheads. These fittings screw into either side of the firewall, tank skin, or web and allows any standard AN pipe-threaded fastener to be screwed into either side.  They work great for all of the fluid and instrumentation penetrations necessary on a firewall or fuel tank.

The fitting consists of two pieces: the bulkhead penetration and the nut that screws on the other side. It leaves you with a female pipe thread on both sides that can accept whatever you have to assemble.

We recommend mounting the fitting with a (supplied) .015-inch stainless steel washer to stiffen the firewall or bulkhead and tighten things up.

Two options are available:

• 1/8″NPT
• 1/4″NPT

They are manufactured from 6061-T6 aluminum and come blue anodized. The ¼-inch size mounts in a 7/8-inch hole, while the 1/8-inch size uses a 5/8-inch opening. Both can be used on bulkhead thicknesses from 0- to 5/16-inch.