stainless steel
needle tube
TeCarve’s Stainless Steel Needle Tube products are precisely engineered for micro-diameter applications demanding tight precision limits, smooth inner surfaces, and exceptional corrosion resistance.
These ultra-fine tubes are commonly used in medical devices, industrial instrumentation, analytical equipment, and fluid delivery systems. Manufactured from high-grade stainless steel, our needle tubes maintain dimensional stability and chemical purity, making them ideal for high-precision and hygienic environments.
Available in seamless or welded variants, with custom OD, wall thickness, and cut-to-length options, TeCarve supplies clean inner bores, tight dimensional control, and mirror-like finishes to meet the strictest performance demands.
ISO 9626 Stainless Needle Tubing: Controlled Temper for Clean Bevel Grinding
Medical needle cannula tubing in grades 304 and 316L with thin walls and controlled temper from our partner factory.
Specifications
Available Sizes by Standard
Markets: Global — stainless steel needle tubing for medical device & diagnostic manufacture (hypodermic gauge series)
| Gauge (G) | Nominal OD (mm) | OD Min (mm) | OD Max (mm) | Wall Class Availability |
|---|---|---|---|---|
| 10G | 3.40 | 3.300 | 3.500 | Regular / Thin |
| 11G | 3.00 | 3.000 | 3.100 | Regular / Thin |
| 12G | 2.70 | 2.720 | 2.800 | Regular / Thin |
| 13G | 2.40 | 2.370 | 2.450 | Regular / Thin |
| 14G | 2.10 | 2.060 | 2.160 | Regular / Thin / Extra-Thin |
| 15G | 1.80 | 1.800 | 1.860 | Regular / Thin / Extra-Thin |
| 16G | 1.65 | 1.600 | 1.680 | Regular / Thin / Extra-Thin |
| 17G | 1.50 | 1.440 | 1.510 | Regular / Thin / Extra-Thin |
| 18G | 1.25 | 1.200 | 1.300 | Regular / Thin / Extra-Thin |
| 19G | 1.06 | 1.030 | 1.100 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 20G | 0.90 | 0.860 | 0.920 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 21G | 0.80 | 0.800 | 0.830 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 22G | 0.70 | 0.698 | 0.730 | Regular / Thin / Extra-Thin |
| 23G | 0.60 | 0.600 | 0.673 | Regular / Thin / Extra-Thin |
| 24G | 0.55 | 0.530 | 0.580 | Regular / Thin / Extra-Thin |
| 25G | 0.50 | 0.500 | 0.530 | Regular / Thin / Extra-Thin |
| 26G | 0.45 | 0.440 | 0.470 | Regular / Thin / Extra-Thin |
| 27G | 0.40 | 0.400 | 0.420 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 28G | 0.36 | 0.349 | 0.370 | Regular / Thin / Extra-Thin |
| 29G | 0.33 | 0.324 | 0.351 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 30G | 0.30 | 0.298 | 0.320 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 31G | 0.25 | 0.254 | 0.267 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 32G | 0.23 | 0.229 | 0.241 | Regular / Thin / Extra-Thin / Ultra-Thin |
| 33G | 0.20 | 0.203 | 0.216 | Regular / Thin / Extra-Thin / Ultra-Thin |
Per ISO 9626:2016(E) Table 1: Outside diameter (OD) is specified as absolute tolerance limits (OD min / OD max) for 10G through 33G. Wall thickness classes include Regular Wall (RW), Thin Wall (TW), Extra-Thin Wall (ETW), and Ultra-Thin Wall (UTW). Manufactured to ASTM A908 / ISO 9626 raw tubing specifications. Minimum inner diameter (ID) values per gauge and wall class available on engineering request.
- Supply Length / Form: Coils or straight cut lengths (custom precision cut lengths from 5mm to 6,000mm)
- Available Grades: 304, 304L, 316, 316L (austenitic precision medical & instrument grades per ISO 15510 / ASTM A908)
- Surface Finish: Precision polished or bright annealed (BA), ID/OD chemically passivated
- Standards Compliance: manufactured to ISO 9626, ASTM A908, ASTM A269, EN 10216-5, JIS G3459, or GB/T 18457
Markets: N. America — small-diameter seamless & welded corrosion-resisting tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 0.90 | 0.15 | ±0.13mm | ±15% |
| 1.59 | 0.20 | ±0.13mm | ±15% |
| 2.38 | 0.28 | ±0.13mm | ±15% |
| 3.18 | 0.35 | ±0.13mm | ±15% |
| 4.76 | 0.49 | ±0.13mm | ±15% |
| 6.35 | 0.71 | ±0.13mm | ±15% |
Per ASTM A269/A269M-15a Table 4: all sizes shown fall in Group 1 (OD up to ½in [12.7mm]), which uses a flat ±0.005in[0.13mm] OD tolerance and ±15% wall allowance — not a percentage-of-OD approximation, and not the ±10% wall variation used by larger Group 2+ sizes.
- Supply Length / Form: Coils or straight cut lengths (custom precision cut lengths from 5mm to 6,000mm)
- Available Grades: 304, 304L, 316, 316L (austenitic precision medical & instrument grades per ISO 15510 / ASTM A908)
- Surface Finish: Precision polished or bright annealed (BA), ID/OD chemically passivated
- Standards Compliance: manufactured to ISO 9626, ASTM A908, ASTM A269, EN 10216-5, JIS G3459, or GB/T 18457
Markets: Europe, Middle East — small-diameter precision tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 1.0 | 0.20 | ±0.03mm (±3.0%) | ±0.03mm (±12.5%) |
| 2.0 | 0.30 | ±0.05mm (±2.5%) | ±0.04mm (±12.5%) |
| 3.0 | 0.40 | ±0.08mm (±2.5%) | ±0.05mm (±12.5%) |
| 4.0 | 0.50 | ±0.10mm (±2.5%) | ±0.06mm (±12.5%) |
| 6.0 | 1.0 | ±0.15mm (±2.5%) | ±0.13mm (±12.5%) |
- Supply Length / Form: Coils or straight cut lengths (custom precision cut lengths from 5mm to 6,000mm)
- Available Grades: 304, 304L, 316, 316L (austenitic precision medical & instrument grades per ISO 15510 / ASTM A908)
- Surface Finish: Precision polished or bright annealed (BA), ID/OD chemically passivated
- Standards Compliance: manufactured to ISO 9626, ASTM A908, ASTM A269, EN 10216-5, JIS G3459, or GB/T 18457
Markets: Japan, Southeast Asia — small-diameter precision tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 1.0 | 0.20 | ±0.10mm (±10.0%) | ±0.03mm (±12.5%) |
| 2.0 | 0.30 | ±0.15mm (±7.5%) | ±0.04mm (±12.5%) |
| 3.0 | 0.40 | ±0.20mm (±6.7%) | ±0.05mm (±12.5%) |
| 4.0 | 0.50 | ±0.25mm (±6.3%) | ±0.06mm (±12.5%) |
| 6.0 | 1.0 | ±0.30mm (±5.0%) | ±0.13mm (±12.5%) |
- Supply Length / Form: Coils or straight cut lengths (custom precision cut lengths from 5mm to 6,000mm)
- Available Grades: 304, 304L, 316, 316L (austenitic precision medical & instrument grades per ISO 15510 / ASTM A908)
- Surface Finish: Precision polished or bright annealed (BA), ID/OD chemically passivated
- Standards Compliance: manufactured to ISO 9626, ASTM A908, ASTM A269, EN 10216-5, JIS G3459, or GB/T 18457
Markets: China domestic & Belt-and-Road — small-diameter precision tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 1.0 | 0.20 | ±0.05mm (±5.0%) | ±0.03mm (±12.5%) |
| 2.0 | 0.30 | ±0.06mm (±3.0%) | ±0.04mm (±12.5%) |
| 3.0 | 0.40 | ±0.08mm (±2.7%) | ±0.05mm (±12.5%) |
| 4.0 | 0.50 | ±0.10mm (±2.5%) | ±0.06mm (±12.5%) |
| 6.0 | 1.0 | ±0.12mm (±2.0%) | ±0.13mm (±12.5%) |
- Supply Length / Form: Coils or straight cut lengths (custom precision cut lengths from 5mm to 6,000mm)
- Available Grades: 304, 304L, 316, 316L (austenitic precision medical & instrument grades per ISO 15510 / ASTM A908)
- Surface Finish: Precision polished or bright annealed (BA), ID/OD chemically passivated
- Standards Compliance: manufactured to ISO 9626, ASTM A908, ASTM A269, EN 10216-5, JIS G3459, or GB/T 18457
Needle Tube End Finishing: Blunt Cut vs. Beveled Tip
TeCarve supplies precision stainless steel needle tubing (10G–33G) in bulk straight lengths/coils and as secondary-processed cannula components. We engineer two primary end-finishing configurations tailored to diagnostic probes, laboratory instrumentation, and OEM device integration:
Blunt / Square-Cut (90°, flat-cut & fine-polished)
Engineered for automated fluid transfer, precision liquid dispensing, and sensor protection where non-puncturing, planar, snag-free tube ends are essential.
- Cutting Technologies: Burr-free electrochemical cutting (ECM) or precision high-speed abrasive wheel cutting combined with secondary centrifugal barrel deburring.
- End Face Perpendicularity: 90° square-cut true perpendicularity within ±1° relative to the tube longitudinal centerline.
- Edge & Surface Quality: 100% deburred ID & OD with radius edge chamfer; polished end face roughness Ra ≤ 0.4 μm preventing particulate generation or lumen flow clogging.
- Key Industrial Applications: Automated reagent dispensing probes, laboratory microfluidics, industrial adhesive/epoxy dispensing tips, thermocouple protection sheaths, and sensor housings.
Beveled / Sharp Tip (multi-facet ground bevel)
Precision-ground for low penetration resistance, clean membrane/septum piercing, and minimal tissue or elastomer displacement across cannula assemblies.
- Bevel Geometries: Standard single bevel (primary bevel angle 12°–15°), tri-bevel / multi-facet lancet grinding (12° primary with 20°–25° secondary side grinds), and anti-coring / Huber curved tips.
- Cutting Edge Honing: Multi-axis CNC automated grind-head finishing producing razor-sharp cutting facets free of feather-edge roll or internal heel burrs.
- Cleaning & Passivation: Multi-stage ultrasonic lumen cleaning removing all microscopic grinding fines, followed by ASTM A967 nitric/citric acid passivation.
- Key Industrial Applications: Veterinary cannula components, sampling stylets, biopsy guide needles, elastomer septum penetrators, and analytical micro-puncture pins.
Quality Management & Regulatory Boundary Notice: TeCarve supplies precision stainless steel needle tubing and custom fabricated cannula components under certified ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 Quality Management Systems. Tubing materials conform strictly to ASTM A908, ISO 9626, and ASTM A269 raw material specifications. Products are supplied solely as raw tubing or semi-finished OEM components. Final medical device classification, biocompatibility validation (ISO 10993), cleanroom packaging, sterilization, and regulatory clearances (including US FDA 510(k) or EU MDR CE marking) remain the direct responsibility of the finished medical device manufacturer.
For micro-bore, continuous-flow and analytical-instrumentation applications, compare Needle Tube with our Stainless Steel Capillary Tube.
For material and fabrication context across finished-device subassemblies, explore our Stainless Steel Medical Devices & Components.
For detailed gauge dimensions, temper distinctions, and medical standard comparisons, see our Capillary Tube vs Needle Tube Selection Guide.
Get Your Needle Tube Specification Quote
Sourcing stainless steel cannula and needle tubing conforming to ISO 9626 dimensional gauges (6G to 34G, RW / TW / UTW)? Contact our technical sales desk for custom cut-to-length tubing, burr-free end finishing, and prototype sample requests for industrial and laboratory dispensing applications.
Regular (RW), Thin (TW), and Ultra-Thin (UTW) wall options across 6G to 34G gauges in 304, 304L, and 316L grades.
Sample cut lengths available for automated feeding verification, tensile testing, and end-beveling trial tooling.
Standard needle tube trial orders start from 500 pieces per gauge/spec. Prototype and custom-processing requirements are reviewed per project.
Standard EN 10204 3.1 Mill Test Certificates detailing chemical analysis, tensile strength, hardness, and dimensional tolerance.
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
- Standards Conformance: ASTM A269/A632 · EN 10216-5 · JIS G3459/G3468 · GB/T 24593/13296 · ISO 9626
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
Features
• Ultra-fine and precise diameters
• Biocompatible and corrosion-resistant
• Smooth internal surface
• High dimensional consistency
• Medical and surgical needles
• Laboratory and analytical instruments
• Capillary fluid transport
• Precision industrial dispensing
Applications
For medical and analytical micro-tubing requirements, review our partner-factory verification procedures, precision gauge inspection, dimensional tolerance control, and clean packaging standards.
Quality Control
• Laser micrometer dimensional testing
• Inner bore inspection with endoscopy
• Surface finish verification
• Chemical and mechanical property analysis
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Needle Tube Inspection & Packaging Photos
Real product, inspection, packaging and loading photos.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We customize stainless steel needle tube by outer diameter, wall thickness, cut length or coil form, grade, polished or bright-annealed finish, tube type, and medical-grade dimensional specifications already defined for the product.
Low MOQ & Rapid Prototyping
Standard needle tube trial orders start from 500 pieces per gauge/spec. For custom gauges, ultra-thin walls, precision cut lengths, beveling, deburring, or special finishes, prototype quantities and production MOQ are confirmed after technical review.
Optimized Lead Time
In-stock standard sizes ship within 7–10 days. Custom specifications typically ship within 10–25 days after deposit, depending on order volume, dimensions, and surface finish. The full cycle—from inquiry and drawing confirmation through sampling, production, inspection, and dispatch—typically takes 33–55 days for custom items.
Global Logistics & On-Time Delivery
For needle tube deliveries worldwide, PVC wrapping and end caps combine with anti-corrosion and moisture protection to protect fine tube surfaces and ends.
How your order is made, checked and shipped
Tube forming at the partner factory
Heat treatment (annealing)
Dimensional inspection
Alloy verification with a handheld analyzer
Export packing
Container loading
What Global Buyers Say About TeCarve Tubing
“I've received the goods and everything is fine.”
“The goods already send to customers. I am waiting for the next order from them.”
“…there is no need of inspection this time… I trust in your product.”
Frequently Asked Questions
What is stainless steel needle tube (hypodermic tube)?
Stainless steel needle tube, also called hypodermic tubing, is precision thin-wall tube used to manufacture medical needles, cannulas, and syringes. It is manufactured to ISO 9626 for dimensional and mechanical requirements for needle tubing.
What gauge sizes does TeCarve supply for needle tube?
TeCarve supplies stainless steel needle tube within the published product specification range: outer diameter 0.3 mm to 6 mm and wall thickness 0.1 mm to 1.0 mm. Non-standard OD and wall combinations can be reviewed against the drawing and application requirements.
What material grade is specified for hypodermic needle tubing?
ISO 9626 specifies grade 304 and 316L stainless steel for hypodermic tubing. Grade 316L is preferred for prolonged or implantable body contact due to its improved corrosion resistance and superior biocompatibility.
How is needle tube different from capillary tube?
Needle tube (hypodermic tubing) is produced to the ISO 9626 gauge system specifically for medical needle manufacturing with very thin walls and precise tolerances. Capillary tube covers a broader size range for industrial, scientific, and medical use outside the hypodermic gauge system.
What tip processing and surface treatments are available?
TeCarve supplies needle tube cut-to-length with plain, deburred, or ground-bevel ends. Custom tip geometry (bevel, lancet, back-bevel), electropolishing, and passivation per ASTM A967 are all available.
Can TeCarve supply full-hard temper needle tubing?
Yes. Our partner factories perform controlled cold drawing to achieve full-hard temper for needle cannula tubing, maintaining ductility for bevel grinding.
Does TeCarve hold ISO 13485 or CE mark for medical needles?
TeCarve holds ISO 9001, 14001, and 45001. We supply raw needle cannula tubing rather than finished medical devices, so CE/ISO 13485 device marks do not apply. Every batch includes EN 10204 3.1 MTC with verified chemistry and mechanical properties for client regulatory filing.
What end finishing options are offered for needle tubes?
We supply needle tubes cut to length with plain, deburred, or rotary cut ends per customer drawing and order requirements.
Contact TeCarve