DELPHI FITTINGS
Product Overview
Delphi Fittings Part 5406-HP is a flush-mount internal hex socket pipe plug manufactured to SAE 130109N specifications. Designed to blank off unneeded female NPTF ports without protruding beyond the manifold surface, Part 5406-HP provides clean, snag-free hydraulic block installations. Its broached internal hex socket accepts standard Allen wrenches, ensuring positive drive engagement even in deeply recessed cavity galleries.
Key Features & Specifications
| Material | High-Grade Carbon Steel (Standard 1215/1045; Stainless 316 on request) |
|---|---|
| Industry Standards | SAE 130109N / ANSI B1.20.3 (NPTF Dryseal) |
| Thread Configuration | Male NPTF Dryseal Tapered Thread |
| Body Style | Flush-Mount Headless Body with Precision Broached Internal Hex Socket |
| Sealing Mechanism | Metal-to-Metal Dryseal Thread Interference (3/4" taper per foot) |
| Corrosion Protection | Standard Cr3+ Clear Trivalent Zinc Plating |
| Primary Function | Flush-mount permanent or service blanking of female NPTF ports |
| Temperature Range | -65°F to +400°F (-54°C to +204°C) depending on media |
Commonly Available Sizes (Part #5406-HP Series)
Delphi Fittings manufactures standard and custom sizes for Part 5406-HP. Nominal thread specifications, wrench hex sizes, and center-to-end reference dimensions for common production sizes are listed below:
| Part Number | Port Thread (Male NPTF) | Internal Hex Drive | Overall Length (Ref) |
|---|---|---|---|
| 5406-HP-01 | 1/16"-27 NPTF Male | 5/32" (4.0 mm) | 0.31" (7.9 mm) |
| 5406-HP-02 | 1/8"-27 NPTF Male | 3/16" (4.8 mm) | 0.38" (9.7 mm) |
| 5406-HP-04 | 1/4"-18 NPTF Male | 1/4" (6.4 mm) | 0.47" (11.9 mm) |
| 5406-HP-06 | 3/8"-18 NPTF Male | 5/16" (7.9 mm) | 0.47" (11.9 mm) |
| 5406-HP-08 | 1/2"-14 NPTF Male | 3/8" (9.5 mm) | 0.63" (16.0 mm) |
| 5406-HP-12 | 3/4"-14 NPTF Male | 9/16" (14.3 mm) | 0.63" (16.0 mm) |
| 5406-HP-16 | 1"-11-1/2 NPTF Male | 5/8" (15.9 mm) | 0.78" (19.8 mm) |
| 5406-HP-20 | 1-1/4"-11-1/2 NPTF Male | 3/4" (19.1 mm) | 0.81" (20.6 mm) |
| 5406-HP-24 | 1-1/2"-11-1/2 NPTF Male | 3/4" (19.1 mm) | 0.81" (20.6 mm) |
| 5406-HP-32 | 2"-11-1/2 NPTF Male | 3/4" (19.1 mm) | 0.88" (22.4 mm) |
Need non-standard dash jumps, metric or BSP transition threads, special drop lengths, or alternative alloy grades (AISI 316 / Brass)? Delphi engineers custom threaded adapters to client blueprint.
Specific Applications & Flow Routing
Part 5406-HP fittings serve critical fluid-routing roles where robust, leak-free performance is essential:
- Manifold Cavity Blanking: Sealing cross-drilled gallery ports flush to maintain clean exterior block profiles.
- Cylinder Port Isolation: Plugging alternate auxiliary ports on dual-acting hydraulic cylinders.
- Pump Test Port Blanking: Sealing factory diagnostic gauge tap holes prior to equipment shipment.
- Gearbox Drain Points: Serving as low-profile drain plugs on mobile equipment undercarriages.
Installation & Assembly Guidance
- Port Cleaning: Clean female port threads of chips and grease before plug insertion.
- Hex Key Fit: Use a high-quality hex key or socket bit that fully seats into the broached internal hex.
- Hand Start: Thread plug into hole by hand 2 full turns to ensure proper thread alignment.
- Torque to Flush: Torque until the top rim sits flush or sub-flush (1/2 to 1 turn past hand-tight) with the manifold face.
Why Source Part 5406-HP from Delphi Fittings?
- Deep Broached Socket: Broached with tight hex tolerances to prevent tool stripping during high-torque makeup.
- Controlled Chamfer: Lead chamfer guides the plug smoothly into tapped holes on high-speed assembly lines.
- Plating Integrity: High-efficiency zinc plating prevents galling and corrosion during extended shelf storage.
- Automated Packaging: Available in taped-and-reeled or bulk vibratory-bowl friendly packaging for OEM automation.
Get a Quote for Part 5406-HP - NPTF Pipe Hex Socket Plug
Distributor pricing, full material certifications, and sample lots available on request. Contact our engineering and sales team for volume quotation and production lead times.
Complementary & Mating Hydraulic Fittings
Commonly paired with Part 5406-HP in hydraulic manifold blocks, fluid power units, and rigid industrial piping assemblies:
