3/8 in. Stainless Steel Flare Union
Overview
The Midland 10108SS is a 3/8 in. stainless steel union that joins two 3/8 in. SAE 45-degree flared tube ends. Machined from stainless steel, it brings superior corrosion and chemical resistance to flare connections that brass cannot handle, making it suited to marine, chemical, and high-temperature service. Each end seats a 45-degree flared tube for a metal-to-metal seal; the thread is 5/8-18.
Technical Specifications
| Manufacturer Part # | 10108SS |
| Fitting Type | SAE 45° Flare Union |
| Connection 1 | 3/8 in. SAE 45° Flare |
| Connection 2 | 3/8 in. SAE 45° Flare |
| Thread Size | 5/8-18 |
Materials of Construction
| Body | Stainless Steel |
| For Use With | Stainless Steel and Other Tubing That Can Be 45° Flared |
Typical Applications
Joins two 3/8 in. SAE 45-degree flared tube runs where corrosion or temperature rules out brass: chemical processing, marine and offshore, food and beverage, instrumentation, and high-temperature fuel or hydraulic lines. Stainless construction holds up to aggressive media and washdown environments.
Cross-Reference and Interchange
This stainless flare union cross-references to these competitor and industry part numbers: 3004. Replacing one of these? Match nominal size, connections, and rating, or send us your part number and we will confirm the interchange.
Sizing and Installation Resources
- Flare Fittings: SAE 45° vs. Inverted
- Compression and Flare Fitting Sizing Chart
- NPT, BSPP and JIC Thread Identification Guide
- Chemical Compatibility Chart for Fluid Handling
Frequently Asked Questions
Why choose stainless over brass?
Stainless resists corrosive media, salt, and high temperatures that would attack brass, and contains no lead.
Does it need thread sealant?
No. Both SAE 45-degree flare seats seal metal-to-metal; no tape or dope is required.
What tube does it join?
Two 3/8 in. tubes that have each been properly 45-degree flared, ideally stainless for a matched assembly.
What is the thread size?
5/8-18, matching a 3/8 in. SAE 45-degree flare.
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.