304 Stainless Steel Capillary Thread Side Hole Puncture Needle

Product Specification

304 Stainless Steel Capillary Thread Side Hole Puncture Needle

Product Description

The 304 Stainless Steel Capillary Threaded Side-Port Puncture Needle is a precision-engineered, multifunctional component designed for secure, sealed, and precise fluid access in demanding applications. It combines a fine-bore capillary tube for handling small volumes, a threaded section (hub or shaft) for robust mechanical connection and sealing, and one or more precision side ports (holes) for alternative fluid egress. This integrated design allows for side-delivery or sampling, while the threads ensure a leak-proof, vibration-resistant interface. Manufactured from durable 304 stainless steel, it is ideal for high-pressure systems, analytical instrumentation, and specialized industrial processes where reliability and precision are paramount.

Product Processing

1. Material Preparation & Tubing Selection: High-quality 304 stainless steel capillary tubing with precise inner and outer diameters is selected, cut to length, and cleaned.

2. Side-Port Machining (Key Process 1): Using precision micro-drilling or Electrical Discharge Machining (EDM), one or more side ports are created at specified locations along the needle shaft. The process ensures accurate hole diameter, positioning, and clean, burr-free edges.

3. Thread Machining (Key Process 2): Threads are precision-cut onto the component:

   • Option A (Hub Threading): A separate hub is machined with internal or external threads (e.g., 10-32 UNF, M6x1) and then permanently attached to the capillary tube via laser welding or brazing.

   • Option B (Direct Shaft Threading): A section of the capillary tube itself is precision-ground or turned to create external micro-threads.

4. Tip Formation: The distal end of the capillary tube is ground to a specific point geometry. This can be a sharp lancet point for piercing septa, a pencil point for non-coring applications, or a blunt tip if used solely for fluid transfer through the side port.

5. Joining & Finishing: For hub assemblies, the joint between the capillary tube and hub is finished to ensure strength and leak integrity. The entire assembly then undergoes electropolishing and chemical passivation to achieve a smooth, corrosion-resistant surface finish.

6. Rigorous Testing & Inspection: 100% inspection includes dimensional checks (OD, ID, thread fit, side-port location/size), helium leak testing or pressure testing to ensure side-port and thread seal integrity, and functional flow testing.

Product Applications

• High-Pressure Chromatography (HPLC/GC): As a sealed, threaded injection port needle or a sample introduction probe with a side port for sheath gas or alternate flow paths.

• Chemical & Process Instrumentation: For sealed sampling from pressurized vessels or pipelines, where the threaded connection ensures safety and the side port allows sampling away from pipe sediment.

• Fluid Power & Pneumatic Systems: As a high-pressure injection or bleed valve component where the threaded connection is critical and fluid is directed laterally.

• Specialized Medical Device Manufacturing (Process Equipment): Used in assembly or filling machinery for precise, sealed delivery of adhesives or fluids (not for direct patient use unless specified as medical grade).

• Research & Development: Custom fluidic interfaces for lab-scale reactors or analytical setups requiring secure connections and specific flow geometries.

Product Technical Parameters (Detailed Table)