316 Stainless Steel Tube Fittings Reducing Union (RU ) – CHIBIN Machine
The 316 stainless-steel Reducing Union (RU) is a double-ferrule compression tube fitting designed to connect two tubes of different outer diameters while maintaining a leak-tight metal-to-metal seal. This straight union is ideal for applications that require a transition between tube sizes — ensuring reliability, corrosion resistance, and long-term durability under pressure. 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 Reducing Union
RU
316Lstainless steel two ferrules tube fittings reducer union, 316 stainless steel double ferrules compression tube fitting reducing union, 316 ferrules straight reducing union, SS316 tube fittings straight union
The 316 stainless-steel Reducing Union (RU) is a double-ferrule compression tube fitting designed to connect two tubes of different outer diameters while maintaining a leak-tight metal-to-metal seal. This straight union is ideal for applications that require a transition between tube sizes — ensuring reliability, corrosion resistance, and long-term durability under pressure.
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
RU Tube Fittings Reducing Union| Part No | Tube OD | Dimensions | H | H1 |  |
||||
|---|---|---|---|---|---|---|---|---|---|
| Ø | Ø 1 | Ø E | F | F1 | L | ||||
| RU08M06M | 8 | 6 | 4.8 | 16.2 | 15.5 | 42.2 | 16 | 14 | 14 |
| RU10M08M | 10 | 8 | 6.4 | 17.2 | 16.2 | 43.9 | 19 | 16 | 17 |
| RU12M10M | 12 | 10 | 8 | 23 | 17.2 | 49 | 22 | 19 | 21 |
| Part No | Tube OD | Dimensions | H | H1 | |
||||
|---|---|---|---|---|---|---|---|---|---|
| Ø | Ø 1 | Ø E | F | F1 | L | ||||
| RU20I10I | 1/4" | 1/8" | 2.4 | 15.5 | 13.2 | 38.8 | 14 | 12 | 14 |
| RU30I20I | 3/8" | 1/4" | 4.8 | 17.2 | 15.5 | 42.8 | 17 | 14 | 16 |
| RU40I20I | 1/2" | 1/4" | 4.8 | 23 | 15.5 | 47.5 | 22 | 14 | 21 |
| RU40I30I | 1/2" | 3/8" | 7 | 23 | 17.2 | 48.5 | 22 | 17 | 21 |
| RU50I40I | 5/8" | 1/2" | 10.5 | 24.9 | 23 | 53.1 | 27 | 22 | 24 |
| RU60I40I | 3/4" | 1/2" | 10.5 | 24.6 | 23 | 54.3 | 28.6 | 22 | 27 |
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316 Stainless Steel Tube Fittings Reducing Union (RU ) – CHIBIN Machine
Since 1980 in Taiwan, CHIBIN Machine makes 316 Stainless Steel Tube Fittings Reducing 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.