DELPHI FITTINGS
Part #: 5406-HP-SS
NPTF Pipe Hex Socket Plug (Stainless Steel)
Product Overview
The Delphi Fittings Part 5406-HP-SS is a high-quality hex socket plug designed to securely seal an unused female NPTF (National Pipe Taper Fuel / Dryseal) port. This plug is manufactured from premium stainless steel (typically Grade 316 SS) for superior resistance to corrosion, chemicals, and extreme temperatures. Its key feature is the internal hexagonal (Allen) drive, which allows for a flush or recessed installation, ideal for applications with space constraints or where a smooth external surface is desired. The NPTF (Dryseal) threads are designed to create a reliable metal-to-metal seal, making this plug an excellent choice for demanding applications in marine, chemical processing, food and beverage, and other harsh environments.
Key Features & Specifications
| Material | High-Grade Stainless Steel (Typically 316 SS for superior corrosion resistance) |
|---|---|
| Configuration | Male NPTF Pipe (Dryseal) Plug (conforming to ANSI B1.20.3 / SAE J476) |
| Head Style | Internal Hexagonal Socket (Allen Drive) for flush or recessed installation. |
| Sealing Mechanism | NPTF Dryseal threads are designed to create a metal-to-metal seal when mated with a female NPTF port. If connecting to a standard NPT female port, the use of a compatible thread sealant is recommended for optimal sealing. |
Commonly Available Sizes (Part #5406-HP-SS Series)
Delphi Fittings offers the 5406-HP-SS Stainless Steel NPTF Hex Socket Plug in a range of common nominal pipe sizes.
Examples include (NPTF Plug Size):
- 5406-HP-02-SS: 1/8" NPTF Hex Socket Plug
- 5406-HP-04-SS: 1/4" NPTF Hex Socket Plug
- 5406-HP-06-SS: 3/8" NPTF Hex Socket Plug
- 5406-HP-08-SS: 1/2" NPTF Hex Socket Plug
- 5406-HP-12-SS: 3/4" NPTF Hex Socket Plug
- 5406-HP-16-SS: 1" NPTF Hex Socket Plug
Note: For unlisted sizes, different stainless steel grades (e.g., 304), or other custom requirements, please contact our sales team.
Applications
The Part 5406-HP-SS Stainless Steel Hex Socket Plug is ideal for:
- Securely sealing unused female NPTF or NPT ports in systems operating in corrosive or high-purity environments.
- Applications where a flush, low-profile finish is required to avoid protrusions that could cause snagging or interference.
- Use in marine and offshore hydraulic systems, chemical processing plants, food and beverage facilities, pharmaceutical production, and water treatment systems.
- Preventing fluid leakage and protecting the internal components of systems from contamination.
Installation & Usage Guidelines
- Ensure the female NPTF port and the male NPTF threads of the plug are meticulously clean and free from any damage or contaminants.
- It is highly recommended to apply a thread lubricant or anti-galling paste suitable for stainless steel to the male threads. If mating with a standard NPT female port, a compatible sealant (like PTFE tape) is also required.
- Insert the plug into the port and hand-tighten.
- Use an appropriately sized Allen key (hexagonal wrench) to tighten the plug to the recommended torque specification, ensuring a secure and leak-proof seal. Avoid over-tightening.
Why Choose Delphi Fittings Part 5406-HP-SS?
- Superior Corrosion Resistance: Manufactured from high-grade stainless steel (typically 316 SS), offering maximum durability in harsh environments.
- Flush Installation: The internal hex socket drive allows the plug to be installed flush with or recessed into the port surface, ideal for applications with space limitations or where a smooth external profile is needed.
- Reliable Sealing: NPTF Dryseal threads provide a robust metal-to-metal seal, minimizing the risk of leaks in critical applications.
- Durable Construction: The solid one-piece design ensures high mechanical strength and integrity.
- Wide Chemical & Temperature Compatibility: Stainless steel is suitable for a broader range of fluids and temperatures than carbon steel.
- Standard Compliance: Conforms to ANSI B1.20.3 / SAE J476 standards.
- Quality-Assured Manufacturing: Produced under Delphi Fittings' rigorous ISO 9001:2015 certified quality management system.
Get a Quote for Part 5406-HP-SS - NPTF Pipe Hex Socket Plug (Stainless Steel)
For a durable, corrosion-resistant, and flush-fitting seal for unused NPT/NPTF ports, the Part 5406-HP-SS Stainless Steel Hex Socket Plug is an excellent choice for your demanding applications. Contact Delphi Fittings today for wholesale pricing, bulk order information, and expert technical support.
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