Bulkhead Union

Bulkhead Unions are engineered for critical industrial applications where fluid, gas, or hydraulic lines must pass securely through enclosures, cabinets, tank walls, or machine frames. By anchoring the fitting directly to the panel with a heavy-duty locknut, Bulkhead Unions eliminate tube fatigue, absorb mechanical vibration, and ensure a reliable, leak-resistant seal.

As an ISO 9001:2015 certified manufacturer, we supply precision CNC-machined bulkhead fittings in Stainless Steel (316/304), Brass, and Carbon Steel. Compatible with major international standards including NPT, BSPP, BSPT, SAE, and Metric threads, our products serve OEMs, industrial distributors, and system integrators worldwide.

Secure Panel Mounting & Anti-Vibration Stability
The main advantage of our Bulkhead Union is its integrated mounting design. The threaded body passes through the pre-drilled panel and locks firmly into place using a precision hex locknut.
Key benefits:

• Reduces Stress: Prevents stress transfer to internal connections caused by external tube movement.
• Vibration Resistant: Maintains tight torque even under continuous equipment vibration or hydraulic pressure fluctuations.
• Uniform Alignment: Ensures clean and professional tube routing through system enclosures.

Micro-Precision Machining for Reliable Sealing Performance (±0.01mm)
Thread accuracy directly impacts installation efficiency and seal integrity. Our 5-axis CNC Swiss machining controls thread profiles and sealing surface roughness (Ra < 0.8 μm) to reduce leakage risks.
Advantages:

• Smooth and precise thread engagement reduces galling during installation.
• Minimizes the risk of cross-threading during assembly line production.
• Provides stable pressure performance and consistent batch quality.

Material Versatility for Harsh Environments
Brass Bulkhead Unions
Excellent machinability and cost efficiency make brass bulkhead unions suitable for pneumatic control systems, air preparation equipment, HVAC applications, and general industrial automation.
Stainless Steel (316/304) Bulkhead Unions
Stainless steel provides improved resistance against corrosion, chemicals, moisture, and saltwater exposure. It is widely used in marine equipment, offshore systems, food processing equipment, and chemical processing lines.
Carbon Steel Bulkhead Unions
Carbon steel offers high mechanical strength combined with corrosion-resistant Zinc-Nickel plating, making it suitable for heavy hydraulic machinery and industrial equipment.

Raw Material Inspection (PMI Testing)
100% spectrometer verification on raw bar stock is performed to confirm material grade and ensure traceability before machining.

CNC Precision Production
Fully automated 5-axis CNC turning ensures consistent dimensions, thread accuracy, and repeatable production quality across large-volume orders.

Thread & Dimensional Gauge Checks
Critical dimensions are inspected using precision measuring equipment, including pitch micrometers and certified Go/No-Go plug and ring gauges.

Pressure & Leak Testing
Hydrostatic proof testing at 1.5x working pressure is available. Helium leak testing can also be provided for high-purity instrumentation applications.

Custom Fabrication
Available customization options include:

• Customized thread lengths
• Extended bulkhead bodies
• Integrated O-ring seals
• Special step-down sizes
• Drawing-based manufacturing

Private Labeling & Packaging
Support available for:

• Laser-etched part numbers and logos
• Custom barcode labeling
• Protective polybag packaging
• Distributor-specific packaging requirements

Reliable Lead Times

• Standard models available for quick shipment.
• Customized mass production typically completed within 2 to 4 weeks depending on specifications and order quantity.

CAD / 3D STEP Files
Free CAD models and 3D STEP files are available to support OEM equipment design and engineering verification.

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