316 Stainless Steel Tube Fittings Bulkhead Union (BU ) – CHIBIN Machine
The 316 stainless steel Bulkhead Union (BU) is a robust double-ferrule compression fitting designed to join two tubing sections through a panel or wall (bulkhead), providing a secure, leak-free, metal-to-metal seal. It is ideal for applications where two tube lines must pass through enclosures, equipment housings, or structural barriers — enabling fluid or gas flow across partitions without external welding or fittings. CHIBIN specializes in stainless tube fittings, compression fittings, Rapid Fittings, Push-in Fittings, Hydraulic Fittings, Pipe Fittings, Quick Couplings, Valves, Nozzles and accepts ODM as well as ODM inquiry.
316 Stainless Steel Tube Fittings Bulkhead Union
BU
Compression tube fittings bulkhead union
The 316 stainless steel Bulkhead Union (BU) is a robust double-ferrule compression fitting designed to join two tubing sections through a panel or wall (bulkhead), providing a secure, leak-free, metal-to-metal seal. It is ideal for applications where two tube lines must pass through enclosures, equipment housings, or structural barriers — enabling fluid or gas flow across partitions without external welding or fittings.
Ordering & Customization:
Standard sizes available for immediate shipment
Custom sizes and OEM/ODM services available
Minimum order quantity (MOQ) and lead time available on request
For quotes, please contact us through the inquiry form below
Features
- Material: 316 Stainless Steel for excellent corrosion resistance and durability
- Design: Double-ferrule metal-to-metal sealing for leak-free performance
- Thread Options: PT, NPT, M, or PF to meet diverse standards
- Installation: Simple, reliable installation without special tools
- Range: Compatible with a wide variety of tube outer diameters (O.D.)
- Finish: Electroplated nut threads for enhanced wear resistance
Technical Data
Working Pressure:
(1) 1/2 inch (12mm) Below: 210 kgf/cm²
(2) 3/4 inch (19mm) Above: 100 kgf/cm²
Suitable Tube O.D.: 1/8 ~ 1 inch ; 3 ~ 20mm
Thread: PT, NPT, M
Note: Available in both metric and imperial sizes. Custom sizes can be provided upon request.
Application
- Suitable for Instruments, Meters, Piping Engineering, Low Pressure and High Temperature Pneumatic Pipelines, Medical Equipment, Agricultural Appliances, Mechanical Parts Assembly, Food Industry, Chemical Plant, Petrochemical Plant, Water Treatment Industry.
Dimension
Specification
BU Tube Fittings Bulkhead Union| Part No | Tube OD | Panel Hole Size | Dimensions | H |  | ||
|---|---|---|---|---|---|---|---|
| Ø | Ø T | Ø E | F | L | |||
| BU06M | 6 | 11.5 | 4.8 | 15.5 | 56.8 | 14 | 16 |
| BU08M | 8 | 13.2 | 6.4 | 16.2 | 59.8 | 16 | 17 |
| BU10M | 10 | 16.3 | 8 | 17.2 | 63.5 | 19 | 22 |
| BU12M | 12 | 19.5 | 9.7 | 23 | 72.5 | 22 | 24 |
| Part No | Tube OD | Panel Hole Size | Dimensions | H | | ||
|---|---|---|---|---|---|---|---|
| Ø | Ø T | Ø E | F | L | |||
| BU20I | 1/4" | 11.5 | 4.8 | 15.5 | 57.5 | 14 | 16 |
| BU30I | 3/8" | 14.7 | 7 | 17.2 | 62.5 | 17 | 19 |
| BU40I | 1/2" | 19.5 | 10.5 | 23 | 72.5 | 22 | 24 |
| BU60I | 3/4" | 25.8 | 16 | 24.6 | 79.6 | 28.6 | 30 |
| BU80I | 1" | 33.7 | 22 | 30.8 | 95.1 | 38 | 38 |
- Related Products
Stainless Steel Rapid Pneumatic Fitting Male Connector
VMC
Rapid pneumatic fittings are designed for fast, tool-free connection and disconnection of air lines,...
Details
Stainless Steel Rapid Pneumatic Fittings Bulkhead Union
VBU
Rapid Pneumatic Fittings Bulkhead Unions are widely used in liquid and gas tubing. It is suitable...
Details
Stainless Steel Rapid Pneumatic Fitting Male Elbow
VME
Rapid Pneumatic Fitting Male Elbows are widely used in liquid and gas tubing. It is suitable...
Details
Stainless Steel Rapid Pneumatic Fittings Male Run Tee
VMRT
Rapid Pneumatic Fittings Male run tees are widely used in liquid and gas tubing. It is suitable...
Details
316 Stainless Steel Male Adapter
TCM
316 Stainless Steel Male adapter is designed for use in tubing lines of automatic control such...
Details- Files Download
Download Exhibition Information
316 Stainless Steel Tube Fittings Bulkhead Union (BU ) – CHIBIN Machine
Since 1980 in Taiwan, CHIBIN Machine makes 316 Stainless Steel Tube Fittings Bulkhead Union —compression, push-in pneumatic, hydraulic, quick couplings, and precision nozzle and needle valves for medical and semiconductor use.
Our fittings are ISO-certified and TTQS-awarded, with MIL-STD-105E quality checks. We stock 10,000+ standard parts and offer OEM/ODM custom runs up to 3,000 pcs.
With advanced CNC manufacturing and 40+ years of experience, CHIBIN Machine meets tight specs for surface finish, thread standards, and leak-tight testing. Get a fast quote today.