DELPHI FITTINGS
Product Overview
Delphi Fittings Part 5404N is a heavy-duty seamless tubular pipe nipple (barrel nipple) manufactured from ASTM A106 Grade B heavy-wall seamless carbon steel pipe. Unlike hex nipples, Part 5404N provides a continuous smooth cylindrical bore with tapered male NPT threads machined onto both ends. Available in close nipple styles (threads touching) and standard lengths, it delivers superior laminar flow and resistance to thermal shock in heavy process piping and hydraulic power units.
Key Features & Specifications
| Material | Seamless Carbon Steel Pipe (ASTM A106 Gr. B / ASTM A53; Sch 80 & Sch 160) |
|---|---|
| Industry Standards | ASME B1.20.1 / ASTM A733 / SAE J476 |
| Thread Configuration | Male NPT × Male NPT Tapered Pipe Threads |
| Body Style | Seamless Cylindrical Tubular Body (Unhexed Barrel / Close) |
| Sealing Mechanism | Thread sealant / anaerobic paste engagement on 3/4" per foot taper |
| Corrosion Protection | Standard Cr3+ Clear Trivalent Zinc Plating or Black Phosphate |
| Primary Function | Heavy-duty flow transfer between female threaded industrial equipment |
| Temperature Range | -20°F to +450°F (-29°C to +232°C) |
Commonly Available Sizes (Part #5404N Series)
Delphi Fittings manufactures standard and custom sizes for Part 5404N. Nominal thread specifications, wrench hex sizes, and center-to-end reference dimensions for common production sizes are listed below:
| Part Number | Pipe Size | Port 1 & 2 Thread | Pipe Schedule | Overall Length (Ref) |
|---|---|---|---|---|
| 5404N-02-CL | 1/8" Pipe | 1/8"-27 NPT Male | Schedule 80 Heavy | 0.75" (19.1 mm) [Close] |
| 5404N-02-15 | 1/8" Pipe | 1/8"-27 NPT Male | Schedule 80 Heavy | 1.50" (38.1 mm) |
| 5404N-04-CL | 1/4" Pipe | 1/4"-18 NPT Male | Schedule 80 Heavy | 0.88" (22.4 mm) [Close] |
| 5404N-04-20 | 1/4" Pipe | 1/4"-18 NPT Male | Schedule 80 Heavy | 2.00" (50.8 mm) |
| 5404N-06-CL | 3/8" Pipe | 3/8"-18 NPT Male | Schedule 80 Heavy | 1.00" (25.4 mm) [Close] |
| 5404N-06-25 | 3/8" Pipe | 3/8"-18 NPT Male | Schedule 80 Heavy | 2.50" (63.5 mm) |
| 5404N-08-CL | 1/2" Pipe | 1/2"-14 NPT Male | Schedule 80 Heavy | 1.12" (28.4 mm) [Close] |
| 5404N-08-30 | 1/2" Pipe | 1/2"-14 NPT Male | Schedule 80 Heavy | 3.00" (76.2 mm) |
| 5404N-12-CL | 3/4" Pipe | 3/4"-14 NPT Male | Schedule 80 Heavy | 1.38" (35.1 mm) [Close] |
| 5404N-12-30 | 3/4" Pipe | 3/4"-14 NPT Male | Schedule 80 Heavy | 3.00" (76.2 mm) |
| 5404N-16-CL | 1" Pipe | 1"-11-1/2 NPT Male | Schedule 80 Heavy | 1.50" (38.1 mm) [Close] |
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 5404N fittings serve critical fluid-routing roles where robust, leak-free performance is essential:
- Hydraulic Reservoir Returns: Connecting return-line filters and diffuser tubes directly into reservoir tank wall bungs.
- Steam & Thermal Oil Lines: Serving as heavy-wall spools in high-temperature heat exchangers and boiler feed headers.
- Close Valve Interconnects: Joining adjacent ball valves, check valves, and strainers with minimal center-to-center distance.
- Piping Spools: Custom length bridging between rigid industrial pipe manifolds and pump suction headers.
Installation & Assembly Guidance
- Pipe Wrench Protocol: Use a clean, sharp-toothed pipe wrench on the cylindrical barrel, gripping near the threaded section.
- Thread Sealant Application: Apply high-performance PTFE paste or anaerobic pipe sealant starting two threads back from the chamfer.
- Close Nipple Tooling: For close nipples where wrench clearance is restricted, employ an internal nipple wrench (expanding mandrel).
- Torque Practice: Tighten 2 to 3 turns past hand-tight per ASME B1.20.1 standards.
Why Source Part 5404N from Delphi Fittings?
- 100% Seamless Tubing: Formed exclusively from prime seamless carbon steel pipe; zero longitudinal weld seams.
- Chamfered Ends: Both ends are fully deburred and chamfered to prevent flow disruption and protect downstream valves.
- Schedule 80 & 160 Stocks: Maintained in extra-heavy wall configurations for extreme industrial longevity.
- Export Packaging: Individually capped or master-packed with vapor corrosion inhibitor (VCI) liner for maritime transit.
Get a Quote for Part 5404N - NPT Pipe Seamless Male Nipple (Barrel Nipple)
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 5404N in hydraulic manifold blocks, fluid power units, and rigid industrial piping assemblies:
