304 316l Stainless Steel Capillary Tapered Thread Side Hole Needle
Product Description
304/316L Stainless Steel Capillary Tube Tapered Tip Threaded Side-Port Needles are precision-engineered, multifunctional fluidic components designed for controlled, leak-proof fluid delivery or extraction in demanding medical, analytical, and industrial applications. These needles integrate four critical features: a precision capillary tube for fine fluid handling; a tapered (reduced-diameter) tip for precise penetration or controlled fluid egress; a threaded hub or shaft for secure mechanical connection; and one or more precision side ports for lateral fluid flow. Manufactured from corrosion-resistant 304 or 316L stainless steel, these components offer exceptional durability, biocompatibility, and chemical resistance. The combination of a tapered tip with side ports enables targeted fluid delivery while the threaded connection ensures a secure, leak-free interface—ideal for high-pressure chromatography, drug delivery systems, and specialized laboratory instrumentation.
Product Applications
Application Area
Specific Applications
Analytical Chemistry & Chromatography
HPLC/GC injection needles with threaded connection for leak-free sample introduction, microfluidic system probes with side ports for sheath flow, capillary electrophoresis sample introduction devices
Medical Devices & Drug Delivery
Drug infusion components requiring precise volumetric control, biopsy needle side ports for tissue sampling, epidural/spinal needles with tapered non-coring tips and threaded Luer connections, implantable drug delivery system ports
Pharmaceutical Manufacturing
Sterile filling needles for vial and syringe filling systems, in-process sampling probes for bioreactors, high-purity fluid transfer components
Laboratory & Research
Micro-injection systems for cell biology, custom fluidic interfaces for experimental setups, precision sampling from sealed vials with threaded septa caps
Chemical Processing
Sampling needles for pressurized reactors, chemical injection ports with secure threaded connections, side-port dispersion nozzles for gas/liquid mixing
Semiconductor & Electronics
Chemical delivery components for wet processing equipment, precision fluid handling in wafer fabrication, cooling system probes with side-port flow
Product Technical Parameters (Detailed Table)
Category
Parameter
Specification / Details
Material Options
Grade
304 Stainless Steel (General purpose, good corrosion resistance) 316L Stainless Steel (Enhanced corrosion resistance, biocompatible, medical grade preferred)
Key Properties
Excellent corrosion resistance, high strength, biocompatible (316L), non-reactive
Standards
ASTM A269, ISO 9626, ASTM A967 (Passivation)
Capillary Tube Dimensions
Outer Diameter (OD) Range
0.3 mm to 2.5 mm (30G to 13G equivalent) – Customizable
Inner Diameter (ID) Range
0.1 mm to 2.0 mm
Wall Thickness
0.1 mm to 0.5 mm (Standard, thin-wall, heavy-wall options)
Overall Length
20 mm to 200 mm (Customizable per application)
Tapered Tip Specifications
Tip Configuration
Gradual taper from full OD to reduced diameter at distal end
Final Tip OD
0.1 mm to 1.0 mm (Reduced from base OD)
Taper Length
2 mm to 20 mm (Customizable)
Tip Geometry
Blunt tapered, sharp beveled, pencil point (non-coring), or custom profile
Distance from tip: 1 mm to 20 mm (Precisely controlled, tolerance ±0.05 mm)
Port Geometry
Round, oval, slotted, or custom shape
Port Edge Finish
Burr-free, electropolished, smooth to prevent clogging
Thread Specifications
Thread Type
Luer Lock (Female/Male): ISO 80369-7 compliant; UNF/UNC: #0-80 to 1/2-20; Metric: M1.6 to M12; NPT: 1/8" to 1/4"; BSPP/BSPT: G1/8 to G1/2; Custom threads available
Thread Location
Proximal hub (most common), integrated into shaft, or separate threaded connector
Thread Fit
Class 2A/2B (standard), Class 3A/3B (precision)
Thread Inspection
100% go/no-go gauge verification
Connection Security
Leak-proof under specified operating pressure
Performance
Pressure Rating
High, dependent on wall thickness and thread integrity; can be engineered for >5000 psi
Leak Integrity
Helium leak testing or hydrostatic pressure testing available
Flow Characteristics
Side ports enable lateral flow distribution; taper controls flow velocity
Operating Temperature
-200°C to +400°C (grade dependent)
Corrosion Resistance
Excellent; 316L provides superior pitting resistance in chloride environments
Surface Finish
Standard Finish
Passivated per ASTM A967 (Nitric or Citric Acid)
Optional Finishes
Electropolished: Ra ≤ 0.2 μm (mirror finish, ultra-clean); Mechanically Polished: Ra 0.4-0.8 μm; Bead Blasted: Uniform matte finish
Internal Lumen Finish
Smooth, electropolished to minimize fluid adhesion and particle retention
Quality & Compliance
Dimensional Inspection
100% OD, ID, tip taper, side-port location, thread fit verification using optical measurement, CMM, thread gauges
Functional Testing
Pressure/leak test, flow rate verification, port integrity test
Material Certification
Mill Test Certificate (MTC) per EN 10204 3.1 provided
Biocompatibility (316L)
ISO 10993-1 compliant; suitable for medical applications
Cleanliness
Cleaned to meet ISO 13485, pharmaceutical, or customer specifications
Quality Standards
ISO 9001:2015, ISO 13485 (Medical) compliant processes available
Laser-Cut 304/316L Stainless Steel Capillary Tube Snake Bone Cardiovascular Stents are ultra-precision, expandable tubular mesh structures engineered for endovascular applications. Manufactured through advanced femtosecond or fiber laser micromachining of medical-grade 304 or 316L stainless steel capillary tubing, these stents feature intricate, flexible “snake bone” or serpentine pattern geometries that provide exceptional radial strength, longitudinal flexibility, and conformability to vessel walls. The laser cutting process produces clean, burr-free struts with minimal heat-affected zones, preserving the material’s mechanical integrity and corrosion resistance. Post-processing treatments including electropolishing and passivation ensure a smooth, biocompatible surface that minimizes thrombogenicity and promotes endothelialization. These precision-engineered scaffolds are designed to maintain vascular patency in coronary, peripheral, and neurovascular interventions.
Product Applications
Application Area
Specific Applications
Coronary Artery Disease
Balloon-expandable stents for treating atherosclerotic blockages in coronary arteries; drug-eluting stent platforms requiring precise strut geometry for uniform drug coating
Peripheral Artery Disease
Stents for iliac, femoral, popliteal, and tibial arteries; self-expanding and balloon-expandable designs for lower extremity revascularization
Neurovascular Interventions
Intracranial stents for aneurysm treatment (flow diversion), carotid artery stenting, and vertebrobasilar artery stenosis management
Biliary & Gastrointestinal
Stents for malignant and benign biliary obstructions; esophageal and colorectal stent applications
Urological Applications
Ureteral stents with flexible “snake bone” designs for improved patient comfort and reduced migration
Veterinary Medicine
Custom stents for animal vascular and non-vascular applications
Research & Development
Prototype stent platforms for novel device development; pre-clinical testing samples
Product Technical Parameters (Detailed Table)
Category
Parameter
Specification / Details
Material Options
Stainless Steel Grades
316L Stainless Steel (Preferred – superior corrosion resistance, biocompatibility) 304 Stainless Steel (Alternative for non-implantable applications)
Key Properties
High radial strength, good ductility, excellent corrosion resistance, proven biocompatibility
Material Standards
ASTM F138 (316L), ASTM F899, ISO 5832-1
Base Capillary Tube
Outer Diameter (OD) Range
0.8 mm to 3.0 mm (pre-cutting) – Expands to 1.5 mm to 6.0 mm post-expansion
Wall Thickness
0.05 mm to 0.15 mm (Ultra-thin wall for low profile)
Tube Length
10 mm to 200 mm (customizable per stent length requirements)
Stent Design Specifications
Pattern Type
Snake Bone / Serpentine Design: Continuous sinusoidal rings with flexible connectors; Closed-cell: Enhanced scaffolding, lower chronic outward force; Open-cell: Superior flexibility, better side-branch access; Hybrid: Combination patterns for optimized performance
Strut Thickness
0.05 mm to 0.12 mm (50-120 μm) – Thin struts for reduced profile and improved healing
Strut Width
0.06 mm to 0.15 mm (60-150 μm)
Stent Length
8 mm to 80 mm (Customizable per application)
Expanded Diameter
1.5 mm to 6.0 mm (dependent on design and post-processing)
Aspect Ratio (Diameter/Length)
Customizable per clinical requirements
Laser Cutting Specifications
Laser Type
Femtosecond Laser: Ultra-short pulses, minimal HAZ, superior edge quality; Fiber Laser: High precision, cost-effective for production
Minimum Feature Size
0.02 mm (20 μm) achievable
Cutting Tolerance
±0.005 mm to ±0.010 mm
Heat-Affected Zone (HAZ)
< 0.005 mm (femtosecond laser) – Preserves material properties
Edge Quality
Smooth, burr-free, minimal dross
Post-Processing
Electropolishing
Removes micro-burrs, smooths strut edges, reduces surface roughness to Ra ≤ 0.05 μm; Essential for biocompatibility and fatigue resistance
Passivation
ASTM A967 – Enhances corrosion resistance
Heat Treatment
Stress relief annealing to restore ductility and eliminate residual stresses from laser cutting
Surface Finish (Final)
Ra ≤ 0.1 μm (mirror-like finish)
Mechanical Properties
Radial Strength
Sufficient to withstand vessel recoil; customizable via strut geometry and thickness
Longitudinal Flexibility
High – snake bone designs provide excellent conformability to tortuous anatomy
Elastic Recoil
< 5% (for balloon-expandable designs)
Fatigue Resistance
Meets ASTM F2477 requirements for 400 million cycles (10-year equivalent)
Radial Force
Customizable per application; higher for peripheral, lower for coronary
Performance Characteristics
Crimped Profile
0.8 mm to 1.5 mm (dependent on stent design and wall thickness) – Low profile for delivery through small vessels
Expansion Ratio
1.5:1 to 3:1 (crimped to expanded diameter)
Foreshortening
< 10% (for optimized designs)
Side-Branch Access
Open-cell designs provide excellent access
MRI Compatibility
MR Conditional (non-ferromagnetic)
Quality & Compliance
Dimensional Inspection
High-magnification optical measurement, vision systems, micro-CT scanning for 3D geometry verification
Mechanical Testing
Radial force testing, crush resistance, 3-point bend flexibility, fatigue testing per ASTM F2477
Material Certification
Mill Test Certificate (MTC) with lot traceability; ISO 5832-1 compliance
Biocompatibility
ISO 10993-1 compliant (Cytotoxicity, Sensitization, Irritation, Systemic Toxicity, Hemocompatibility)
Cleanliness
Cleaned to meet implantable device cleanliness standards
Quality Standards
Manufactured under ISO 13485 (Medical Devices) quality management system
Regulatory Support
Supports FDA 510(k), PMA, and CE MDR submissions with full device history records (DHR)