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:
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.
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