SMC 6-4N
Stainless Steel Male Connector – 3/8" Tube x 1/4" MNPT
- Model: SMC 6-4N (3/8" tube OD (Outer Diameter) x 1/4" Male National Pipe Taper (MNPT))
- Type: Straight Male Connector (compression to tapered pipe thread)
- Material: 316 Stainless Steel (corrosion-resistant alloy)
- Pressure Rating: Dependent on tubing wall and torque applied
- Design: Straight-body tube-to-pipe adapter with dual-ferrule seal
- Finish: Polished and passivated for clean fluid handling
| End Size | 44200in |
|---|---|
| End Type | National Pipe Thread (NPT) |
| Inch/Metric | Inch |
| Tube Outside Diameter D | 3/8in, mm |
| Width Across Flats h | 5/8in, mm |
| Dimension A | 16.76mm |
|---|---|
| Dimension B | 19.30mm |
| Dimension I | 32.51mm |
| Dimension L | 39.87mm |
| Dimension d [Min] | 7.11mm |
Stainless Steel Male Connector – 3/8" Tube x 1/4" MNPT (SMC 6-4N)
The SMC 6-4N is an instrumentation male connector built to transition 3/8" stainless steel tubing into a 1/4" Male National Pipe Taper (MNPT) threaded port. Designed with a compact, straight-body form, this connector features a dual-ferrule compression end and tapered thread for leak-tight, high-pressure integration.
Crafted from 316 stainless steel, it’s corrosion resistant, vibration fatigue, and thermal cycling, making it suitable for aggressive media, outdoor installs, or sanitary environments. It’s a trusted choice for Original Equipment Manufacturer (OEM) builds, lab systems, Clean-in-Place (CIP) loops, and any configuration requiring threaded instrument connection points.
Key Benefits
- Enables transition from 3/8" tubing to 1/4" MNPT threads
- Dual-ferrule compression design for secure, reusable seals
- MNPT taper threads ensure pressure-tight pipe connection
- 316 stainless steel body for rugged, clean, and chemical-resistant uses
- Ideal for small-port regulators, manifolds, and valves
- Quick to install, with no welding or sealant on the compression side
Typical Applications
- OEM test panels and fluid skids
- Gas panel instrument ports
- CIP (Clean In Place) chemical or rinse fluid connections
- Laboratory process setups
- Valve or sensor thread terminations
The SMC 6-4N delivers clean 316 stainless performance and leak-free integration—without inflating your project budget.
| Swagelok® | 600-1-4 |
|---|---|
| Parker (Alok)® | 6MSC4N |
| Hy-Lok® | CMC 6-4N |
| Tylok (CBC-Lok)® | 6-COS-4 |
| Ham-Let (Let-Lok)® | 768L 3/8 X 1/4 |
| Hoke (Gyrolok)® | 6CM4 |
| Dk-Lok® | COS6-4N |
| Bi-Lok (Series D)® | DCT-6-4 |
| SSP (DUlok)® | D6MC4 |
