HEX NIPPLE - NPT X UF (REF. 6401)
HEX NIPPLE - NPT X UF (REF. 6401)
The Hex Nipple – NPT x UF (Ref. 6401) is a dual-threaded pipe fitting designed to connect two components with different male thread types: NPT (National Pipe Taper) on one end and UF (Unified Fine Thread) on the other. Featuring a central hexagonal body for easy wrench grip, this fitting is ideal for joining systems with dissimilar threading standards while ensuring a compact, leak-tight, and pressure-rated connection. Engineered for high-performance fluid, gas, and instrumentation systems, the Hex Nipple – NPT x UF is available in sizes ranging from 1/8” to 2” (or 3mm to 50mm) and is precision-machined from top-grade materials such as Stainless Steel, Brass, Duplex, Monel, and Hastelloy. Its dual-thread configuration makes it highly versatile in mixed-thread piping environments commonly found in industrial, process, petrochemical, and OEM applications.
- Reference Code: 6401
- Connection Type: NPT male x UF (Unified Fine Thread) male
- Thread Standards: ANSI B1.20.1 (NPT), UNF (Unified Fine)
- Hex Body: For secure wrench tightening and ease of installation
- Size Range: 1/8” to 2” / 3mm to 50mm
- Material Options: Stainless Steel, Brass, Duplex, Monel, Hastelloy
- Precision-Machined Threads: Ensure proper fit and leak-free performance
- Standards Compliance: Conforms to international pipe fitting and pressure equipment standards
- Connects components with differing thread standards (NPT x UF)
- Hex body allows easy and secure tool access during installation
- Reduces the need for adapters or additional fittings in mixed-thread systems
- High corrosion, pressure, and temperature resistance for demanding environments
- Ideal for OEM assemblies, process skids, and industrial applications
- Long-lasting performance reduces maintenance and downtime
| Part Number | T (NPT) | Tx | Tx (UNF/UN-2A) | L (mm) | ∅ D (mm) | ∅ d (mm) | H (Inch) |
|---|---|---|---|---|---|---|---|
| PHN-2N-4UF | 1/8″ | 1/4″ | 7/16″-20 | 26.4 | 4.4 | 4.4 | 9/16 |
| PHN-2N-6UF | 1/8″ | 3/8″ | 9/16″-18 | 26.4 | 4.8 | 7.5 | 11/16 |
| PHN-2N-5UF | 1/8″ | 5/16″ | 1/2″-20 | 25.9 | 4.8 | 6.0 | 5/8 |
| PHN-4N-4UF | 1/4″ | 1/4″ | 7/16″-20 | 31.5 | 7.1 | 4.4 | 9/16 |
| PHN-4N-5UF | 1/4″ | 5/16″ | 7/8″-14 | 30.5 | 7.1 | 6.0 | 5/8 |
| PHN-4N-6UF | 1/4″ | 3/8″ | 9/16″-18 | 32.5 | 7.1 | 7.4 | 11/16 |
| PHN-4N-8UF | 1/4″ | 1/2″ | 3/4″-16 | 35.0 | 7.1 | 9.9 | 7/8 |
| PHN-6N-6UF | 3/8″ | 3/8″ | 9/16″-18 | 31.0 | 10.3 | 7.1 | 3/4 |
| PHN-6N-8UF | 3/8″ | 1/2″ | 3/4″-16 | 35.0 | 9.9 | 9.9 | 7/8 |
| PHN-6N-10UF | 3/8″ | 5/8″ | 7/8″-14 | 37.6 | 10.3 | 12.3 | 1 |
| PHN-6N-12UF | 3/8″ | 3/4″ | 1.1/16″-12 | 39.4 | 10.3 | 15.5 | 1.1/4 |
| PHN-8N-6UF | 1/2″ | 3/8″ | 9/16″-18 | 37.6 | 13.5 | 7.1 | 7/8 |
| PHN-8N-8UF | 1/2″ | 1/2″ | 3/4″-16 | 39.6 | 13.5 | 9.9 | 7/8 |
| PHN-8N-10UF | 1/2″ | 5/8″ | 7/8″-14 | 43.0 | 13.5 | 12.3 | 1 |
| PHN-8N-12UF | 1/2″ | 3/4″ | 1.1/16″-12 | 46.7 | 13.5 | 15.5 | 1.1/4 |
| PHN-12N-8UF | 3/4″ | 1/2″ | 3/4″-16 | 40.0 | 18.3 | 9.9 | 1.1/8 |
| PHN-12N-10UF | 3/4″ | 5/8″ | 7/8″-14 | 41.6 | 18.3 | 12.3 | 1.1/8 |
| PHN-12N-12UF | 3/4″ | 3/4″ | 1.1/16″-12 | 46.7 | 18.3 | 15.5 | 1.1/4 |
| PHN-12N-14UF | 3/4″ | 7/8″ | 1.3/16″-12 | 44.0 | 18.3 | 18.3 | 1.3/8 |
| PHN-12N-16UF | 3/4″ | 1″ | 1.5/16″-12 | 49.5 | 18.3 | 21.4 | 1.1/2 |
| PHN-16N-12UF | 1″ | 3/4″ | 1.1/16″-12 | 49.5 | 23.8 | 15.5 | 1.3/8 |
| PHN-16N-16UF | 1″ | 1″ | 1.5/16″-12 | 52.0 | 23.8 | 21.4 | 1.1/2 |
| PHN-16N-20UF | 1″ | 1.1/2″ | 1.7/8″-12 | 55.9 | 23.8 | 33.3 | 2.1/8 |
| PHN-20N-20UF | 1.1/4″ | 1.1/4″ | 1.5/8″-12 | 55.1 | 31.7 | 27.4 | 1.7/8 |
| PHN-20N-24UF | 1.1/4″ | 1.1/2″ | 1.7/8″-12 | 56.5 | 31.7 | 33.3 | 2.1/8 |
| PHN-24N-24UF | 1.1/2″ | 1.1/2″ | 1.7/8″-12 | 57.9 | 38.1 | 33.3 | 2.1/8 |
| PHN-32N-32UF | 2″ | 2″ | 2.1/2″-12 | 62.8 | 49.2 | 45.2 | 2.3/4 |