Twin Bulkhead Pass-Through Plates

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Twin Bulkhead Pass-Through Plate for Fuel, Oil, Coolant & Air Systems

Designed for routing two fluid lines through vehicle bulkheads, firewalls and custom panels, our twin bulkhead pass-through plate provides a neat and secure connection point between compartments. Four fully threaded ports allow adapters to be installed on either side of the plate, making it suitable for fuel, oil, coolant, water and air systems.

Why Choose Our Twin Bulkhead Pass-Through Plate?

Twin Pass-Through Design

Routes two separate fluid lines through a single bulkhead plate, providing a clean and compact installation through bulkheads, firewalls and custom panels.
Fully Threaded Ports

Four fully threaded ports allow compatible adapters to be installed from either side of the plate. Two thread configurations are available:
- M22 x 1.50 Plate
  
  Requires M22 male adapters for connecting AN6–AN12 hose systems.
- -20 ORB Plate
  
  Requires AN20 ORB adapters for connecting AN16 or AN20 hose systems. The -20 ORB ports use a straight 1 5/8"-12 UNF thread and seal with an O-ring rather than on a 37° flare.
6061-T6 Aluminium Construction

Precision CNC machined in the UK from lightweight, high-strength 6061-T6 aluminium and available with a black, grey or silver anodised finish for increased wear and corrosion resistance.
Sealed Mounting Face

An integrated nitrile O-ring on the rear mounting face provides a watertight seal between the plate and mounting surface.
Simple Installation

A drilling template is included to help accurately position and install the plate.

What is a Bulkhead Pass-Through Plate?

A bulkhead pass-through plate provides fixed connection points for routing fluid lines through a bulkhead, firewall or panel. Rather than passing hoses directly through the panel, adapters and hoses connect to either side of the plate, creating a neat, secure and serviceable installation.

Suitable Applications

Ideal for fuel, oil, coolant, water and air systems in motorsport, performance vehicles, kit cars and custom installations where two lines need to pass through a bulkhead or panel.

Plate Type: Twin Bulkhead Pass-Through Plate Routes two fluid lines through a bulkhead or panel
Material: 6061-T6 Aluminium Lightweight, high-strength alloy
Finish: Black, Grey or Silver Anodised Protects against wear and corrosion
Port Threads: Fully Threaded Allows adapters to be installed from either side
Mounting Seal: Nitrile O-Ring Provides a watertight seal against the mounting surface
Manufactured In: United Kingdom Precision CNC machined

Port Configuration: Twin Pass-Through Two independent passages with four fully threaded ports
Mounting: Bulkhead Mounted Suitable for bulkheads, firewalls and custom panels
Installation: Drilling Template Included Designed for accurate installation

Available twin bulkhead pass-through plate thread sizes and compatible hose sizes
Product Code	Port Thread	Compatible Hose Sizes
BUL-PLA-2-AL-M22X15	M22 x 1.50 Metric straight thread	AN6–AN12 M22 male adapter required
BUL-PLA-2-AL-AN20	1 5/8"-12 UNF -20 ORB	AN16–AN20 -20 ORB adapter required

Important: The 1 5/8"-12 UNF ports are -20 ORB and require an O-ring boss adapter. Do not use a standard AN20 JIC fitting, as JIC fittings are designed to seal against a 37° flare rather than with an O-ring.

Fuel Systems
Oil Systems
Coolant Systems
Air Systems
Bulkheads
Firewalls
Custom Panels
Motorsport
Kit Cars

Fuel
Engine Oil
Coolant
Water
Air

Choose M22 male adapters for the M22 x 1.50 plate or -20 ORB adapters for the 1 5/8"-12 UNF plate.

Free repair or replacement for two years from the date of purchase. Learn more

Frequently Asked Questions

What is a twin bulkhead pass-through plate?
A twin bulkhead pass-through plate provides fixed connection points for routing two separate fluid lines through a bulkhead, firewall or panel. Hoses and adapters connect on either side of the plate, creating a neat and secure installation between compartments.
How many connections does the twin bulkhead plate have?
The plate has four fully threaded ports, forming two separate pass-through connections. Each fluid line has a connection on either side of the plate.
What thread sizes are available?
The twin bulkhead pass-through plate is available with M22 x 1.50 or -20 ORB ports. The -20 ORB version uses a 1 5/8"-12 UNF straight thread.
What adapters do I need for the M22 x 1.50 plate?
The M22 x 1.50 version requires M22 male adapters. These can be used to connect AN6–AN12 hose systems.
What adapters do I need for the -20 ORB plate?
The -20 ORB version requires AN20 ORB adapters. These can be used to connect AN16 or AN20 hose systems.
Can I use a standard AN20 JIC fitting in the -20 ORB ports?
No. Although AN20 JIC and -20 ORB use the same 1 5/8"-12 UNF thread size, they use different sealing methods. A standard AN20 JIC fitting is designed to seal on a 37° flare, while the -20 ORB ports require an O-ring boss adapter that seals with an O-ring.
What fluids can the bulkhead plate be used with?
The plate is suitable for fuel, engine oil, coolant, water and air systems.
Is a drilling template included?
Yes. A drilling template is included to help accurately position and install the plate on a bulkhead, firewall or custom panel.