316 Stainless Steel Tube Fittings Union (U ) – CHIBIN Machine
The 316 stainless steel Straight Union (U) is a double-ferrule compression tube fitting, engineered to connect two tubes of identical diameter with a leak-free, metal-to-metal seal. With both ends using high-grade 316 stainless steel (body, nut, and ferrules), this union delivers reliable performance under pressure — ideal for instrumentation, chemical, water-treatment, food & beverage, medical, petrochemical, and general industrial fluid or gas systems 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 Union
U
316L stainless steel (inox 316) two ferrules tube fittings union, 316L stainless steel (inox 316) double ferrules compression tube fitting union, 316 ferrules straight union
The 316 stainless steel Straight Union (U) is a double-ferrule compression tube fitting, engineered to connect two tubes of identical diameter with a leak-free, metal-to-metal seal. With both ends using high-grade 316 stainless steel (body, nut, and ferrules), this union delivers reliable performance under pressure — ideal for instrumentation, chemical, water-treatment, food & beverage, medical, petrochemical, and general industrial fluid or gas systems
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
U Tube Fittings Union| Part No | Tube OD | Dimensions | H |  |
||
|---|---|---|---|---|---|---|
| Ø | Φ E | F | L | |||
| U03M | 3 | 2.4 | 12.8 | 35.2 | 12 | 12 |
| U04M | 4 | 2.5 | 13.8 | 38.1 | 12 | 12 |
| U06M | 6 | 4.8 | 15.5 | 41.6 | 14 | 14 |
| U08M | 8 | 6.4 | 16.2 | 42.8 | 16 | 14 |
| U10M | 10 | 8 | 17.2 | 45 | 19 | 17 |
| U12M | 12 | 9.7 | 23 | 52 | 22 | 21 |
| U14M | 14 | 11 | 23.3 | 52.6 | 24 | 22 |
| U15M | 15 | 12 | 25.3 | 55 | 24 | 22 |
| U16M | 16 | 12.7 | 24.9 | 53.7 | 27 | 24 |
| U18M | 18 | 15 | 24.8 | 55.5 | 30 | 27 |
| U20M | 20 | 16 | 26.5 | 56 | 32 | 30 |
| U22M | 22 | 18 | 26.5 | 56 | 36 | 30 |
| U25M | 25 | 22 | 30.7 | 64.4 | 38 | 35 |
| Part No | Tube OD | Dimensions | H | |
||
|---|---|---|---|---|---|---|
| Ø | Φ E | F | L | |||
| U10I | 1/8" | 2.4 | 13.2 | 36 | 12 | 12 |
| U20I | 1/4" | 4.8 | 15.5 | 41.6 | 14 | 14 |
| U30I | 3/8" | 7 | 17.2 | 44 | 17 | 16 |
| U40I | 1/2" | 10.5 | 23 | 52 | 22 | 21 |
| U50I | 5/8" | 12.7 | 24.9 | 53.7 | 27 | 24 |
| U60I | 3/4" | 16 | 24.6 | 55.1 | 28.6 | 27 |
| U80I | 1" | 22 | 30.8 | 64.6 | 38 | 35 |
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316 Stainless Steel Tube Fittings Union (U ) – CHIBIN Machine
Since 1980 in Taiwan, CHIBIN Machine makes 316 Stainless Steel Tube Fittings 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.