Product Positioning and Core Structure
This product is a hollow full-thread external joint (also known as: hollow external thread sleeve, full-thread connecting pipe), featuring a full external thread wrapping + hollow through-structure design:
- The outer surface is equipped with high-precision threads, allowing direct screwing into internal threaded interfaces (e.g., valves, pipe fittings, equipment bases).
- The internal hollow channel supports fluid transmission, cable threading, or structural connection without media, enabling the integration of "connection + functional channel."
Technical Parameters and Performance Highlights
| Dimension | Key Parameters | Technical Analysis |
| Material System | Stainless steel 304/316 (primary choice), carbon steel (zinc-plated) | - 304/316: Resistant to acids, alkalis, and salt spray (salt spray test ≥100 hours), suitable for food, chemical, and marine applications. - Zinc-plated carbon steel: Cost-effective, ideal for dry environments (salt spray test ≥48 hours). |
| Thread Specifications | Pipe threads (G1/8"–G2", NPT1/4"–NPT1"), metric threads (M8–M36) | - Pipe threads: G is a parallel pipe thread (requires a sealant); NPT is a tapered pipe thread (self-sealing, suitable for high pressure). - Metric threads: Designed for mechanical structural connections, with a thread tolerance class of 6g. |
| Custom Dimensions | Length: L=10–100mm (standard: 15/20/25mm); outer diameter: D matches the thread (e.g., G1/2" outer diameter ≈20.95mm); inner diameter: d=D–2*wall thickness (wall thickness: 2–5mm) | The hollow inner diameter can be customized (e.g., larger diameters for cable threading), and the wall thickness ensures tensile strength (≥200MPa). |
| Surface Treatment | Stainless steel mirror polishing (Ra≤1.6μm), blue-white zinc/plated color zinc for carbon steel | Enhances corrosion resistance and aesthetics. Stainless steel can be customized with passivation, nickel plating, or other special treatments. |
Application Scenarios and Value Proposition
Fluid Engineering:
- Plumbing systems: Connects faucets and angle valves (G thread + PTFE tape to prevent leakage).
- Industrial pipelines: Transmits chemical fluids (316 stainless steel) and beverages (304 stainless steel, food-grade), with the hollow structure ensuring unobstructed media flow.
Mechanical Assembly:
- Structural connections: Used for machine tool bases and brackets (M thread, with hollow channels for hydraulic pipes/air hoses).
- Vibration environments: Full-thread engagement provides strong vibration resistance, replacing welding for easy disassembly and maintenance.
Electrical Wiring:
- Cable threading sleeves: The hollow channel routes cables, while external threads secure the component to equipment enclosures (e.g., control cabinets, sensor bases), integrating connection and wiring functions.
Differentiated Advantages
- Dual-function of "connection + channel": Unlike traditional external threads (which only connect), this product’s hollow design enables simultaneous media/cable transmission, reducing system complexity.
- Precision thread guarantee: Utilizes a thread-rolling process for full, uniform thread profiles and strict tolerances (100% inspection with go/no-go gauges), ensuring compatibility with both imported and domestic internal threaded components.
- Multi-scenario adaptability: Supports dual systems (pipe threads for fluids, metric threads for structures) and materials (stainless steel/carbon steel), meeting needs from civil applications (plumbing) to industrial settings (chemical engineering).