Straight Bulkhead Adapter

Firewalls and panels are not obstacles; they're mounting points waiting for a bulkhead.

Passing a hose through sheet metal without a proper fitting is how lines chafe through and systems die young. The Finish Line Factory Straight Bulkhead Adapter mounts through the panel with a shoulder and nut, presenting male AN flares on both sides, in 3AN, 4AN, 6AN, 8AN, 10AN, 12AN, 16AN, 20AN. The panel becomes an anchor and the pass-through becomes two clean, serviceable connections.

Benefits

• Lines anchor solidly at the panel instead of sawing against a raw hole
• Both sides present ordinary flares with ordinary wrench access
• Each side connects and services independently, so firewall work stops being a two-person job
• The finished pass-through looks factory, not improvised

Features

• Panel-mount bulkhead with clamping shoulder (nut sold separately or included per FLF packaging)
• Male AN flare both sides, 3AN, 4AN, 6AN, 8AN, 10AN, 12AN, 16AN, 20AN
• 37 degree flare sealing at both connections
• Suits fuel, oil, water, and air delivery
• Pairs with FLF Bulkhead Nuts and PTFE washers
• Sold as a single fitting

The Details

A bulkhead splits every pass-through into three solved problems: the panel joint, which is mechanical and clamped; and two hose connections, which seal dry on their 37 degree flares like any AN joint. Drill the panel to the fitting's shank size, deburr both faces, and clamp with the nut over a washer so thin metal stays flat, holding the fitting flats so it cannot spin. From then on, either side's hose can come off for service without disturbing the other, which is the whole quiet genius of bulkhead plumbing.

Kit Includes

• 1x Straight Bulkhead Adapter (size per your selection)

Applications

• Sizes: 3AN, 4AN, 6AN, 8AN, 10AN, 12AN, 16AN, 20AN
• Common uses: firewall fuel and oil pass-throughs, trunk-mount fuel systems, fuel cell panels, gauge line pass-throughs
• Pairs with FLF Bulkhead Nuts, PTFE washers, and standard female AN hose ends