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High Pressure Zinc Plated Carbon Steel NPT Fittings for Industrial Use
In challenging industrial settings, our NPT Fittings are designed to provide exceptional durability and leak-proof performance. These fittings are made with tapered NPT (National Pipe Taper) threads, which guarantee a tight, safe seal for fluid transfer, pneumatic, and high-pressure hydraulic systems. They are perfect for severe environments because of their zinc-plated carbon steel construction, which improves corrosion resistance. These fittings, which come in a variety of configurations such as elbows, tees, couplings, and adapters, satisfy strict industrial standards.
Description
Why Choose Our NPT Fittings?
✅ Robust Construction – Made from high-grade (1045 steeel) carbon steel with a zinc-plated finish for enhanced strength and corrosion resistance. We also offer the plating service, such as zinc nickel plated, nickel plated and ect.
✅ Tapered Thread Seal – NPT threads create a tight, pressure-resistant seal without additional adhesives. In order to meet customers' requirements for higher sealing performance, we also make NPTF threads.
✅ Wide Compatibility – Conforms to ANSI/ASME B1.20.1 standards, ensuring compatibility with most North American piping systems.
✅ High-Temperature Resistance – Performs reliably in environments with extreme heat or thermal cycling.
✅ Versatile Configurations – Available in elbows (45°/90°), tees, unions, bushings, and adapters for flexible installation.
✅ Easy Installation – No special tools required; simply tighten for a secure fit.
Technical Data
NPTF Male x NPTF Male Straight Union Adapter
| A | B | Part No | L | E | F | H1 | ||
| Dash | NPT | Dash | NPT | mm | mm | mm | mm | |
| -2 | 1/8-27 | -2 | 1/8-27 | 1N-0202 | 27 | 10 | 10 | 11.1 |
| -4 | 1/4-18 | -2 | 1/8-27 | 1N-0402 | 32 | 15 | 10 | 14.3 |
| -4 | 1/4-18 | -4 | 1/4-18 | 1N-0404 | 37 | 15 | 15 | 15.9 |
| -6 | 3/8-18 | -2 | 1/8-27 | 1N-0602 | 32 | 16 | 10 | 19.1 |
| -6 | 3/8-18 | -4 | 1/4-18 | 1N-0604 | 37 | 16 | 15 | 19.1 |
| -6 | 3/8-18 | -6 | 3/8-18 | 1N-0606 | 37 | 16 | 16 | 19.1 |
| -8 | 1/2-14 | -2 | 1/8-27 | 1N-0802 | 37 | 20 | 10 | 22.2 |
| -8 | 1/2-14 | -4 | 1/4-18 | 1N-0804 | 43 | 20 | 15 | 22.2 |
| -8 | 1/2-14 | -6 | 3/8-18 | 1N-0806 | 43 | 20 | 16 | 22.2 |
| -8 | 1/2-14 | -8 | 1/2-14 | 1N-0808 | 48 | 20 | 20 | 22.2 |
| -12 | 3/4-14 | -4 | 1/4-18 | 1N-1204 | 45 | 20 | 15 | 28.6 |
| -12 | 3/4-14 | -6 | 3/8-18 | 1N-1206 | 45 | 20 | 16 | 28.6 |
| -12 | 3/4-14 | -8 | 1/2-14 | 1N-1208 | 50 | 20 | 20 | 28.6 |
| -12 | 3/4-14 | -12 | 3/4-14 | 1N-1212 | 50 | 20 | 20 | 28.6 |
| -16 | 1-11.5 | -6 | 3/8-18 | 1N-1606 | 50 | 26 | 16 | 34.9 |
| -16 | 1-11.5 | -8 | 1/2-14 | 1N-1608 | 55 | 16 | 20 | 34.9 |
| -16 | 1-11.5 | -12 | 3/4-14 | 1N-1612 | 55 | 26 | 20 | 34.9 |
| -16 | 1-11.5 | -16 | 1-11.5 | 1N-1616 | 59 | 26 | 26 | 34.9 |
| -20 | 1.1/4-11.5 | -12 | 3/4-14 | 1N-2012 | 57 | 27 | 20 | 44.5 |
| -20 | 1.1/4-11.5 | -16 | 1-11.5 | 1N-2016 | 62 | 27 | 26 | 44.5 |
| -20 | 1.1/4-11.5 | -20 | 1.1/4-11.5 | 1N-2020 | 63 | 27 | 27 | 44.5 |
| -24 | 1.1/2-11.5 | -12 | 37725 | 1N-2412 | 60 | 28 | 20 | 50.8 |
| -24 | 1.1/2-11.5 | -16 | 1-11.5 | 1N-2416 | 65 | 28 | 26 | 50.8 |
| -24 | 1.1/2-11.5 | -20 | 1.1/4-11.5 | 1N-2420 | 66 | 28 | 27 | 50.8 |
| -24 | 1.1/2-11.5 | -24 | 1.1/2-11.5 | 1N-2424 | 66 | 28 | 28 | 50.8 |
| -32 | 2-11.5 | -16 | 1-11.5 | 1N-3216 | 67 | 28 | 26 | 63.5 |
| -32 | 2-11.5 | -20 | 1.1/4-11.5 | 1N-3220 | 70 | 28 | 27 | 63.5 |
| -32 | 2-11.5 | -24 | 1.1/2-11.5 | 1N-3224 | 71 | 28 | 28 | 63.5 |
| -32 | 2-11.5 | -32 | 2-11.5 | 1N-3232 | 72 | 28 | 28 | 63.5 |
Details
1. Premium Material & Finish: carbon steel material offers high tensile strength for 3,000+ PSI pressure ratings. And zinc plating electroplated coating prevents oxidation and extends service life, can pass 120hours salt spray test.
2. Precision NPT Thread Design: Self-Sealing taper threads tighten progressively to form a metal-to-metal seal under pressure. Comparing NPT and NPTF, while standard NPT fittings require thread sealant, our fittings’ precision machining minimizes leakage risks.
3. Pressure & Chemical Resistance: working pressure can up to 6,000 PSI (varies by size and configuration). And chemical compatibility resists oils, water, mild acids, and alkalis.
4. Industry Compliance: our NPT fittings meet ASME B16.11, ASTM A105, and ANSI specifications for safety and performance.
5. Sizes & Configurations: we offer NPT fittings range from 1/8" to 2". And the shape includes male/female adapters, hex nipples, caps, and crosses for comprehensive solutions.
Application
Hydraulic & Pneumatic Systems – Ensures leak-free connections in high-pressure fluid and air systems.
Oil & Gas Industry – Resists corrosion and withstands extreme pressure in pipelines and refineries.
Manufacturing Machinery – Used in heavy-duty equipment requiring reliable, threaded connections.
Water Treatment & Chemical Processing – Zinc plating protects against rust in wet or corrosive environments.
Automotive & Transportation – Suitable for fuel lines, brake systems, and compressed air applications.
