15 mL Centrifuge Tube & Transport Vial Screw Caps — HDPE, Natural, 1000/Bag (300-3010-02N)
These natural High-Density Polyethylene (HDPE) screw caps are designed to provide a positive, leak-free threaded closure for Caplugs® Evergreen 15 mL centrifuge tubes and 7 mL transport vials (240-3007 / 240-3010 series). Supplied non-sterile in 1000/Bag, part number 300-3010-02N meets IATA P650 requirements for primary biological specimen packaging and is rated for cryogenic storage at −80°C, routine −20°C freezing, and autoclave sterilization at 121°C — making it one of the most versatile tube caps available for clinical, biorepository, and research workflows.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3010-02N |
| Cap Type | Screw cap — threaded tube engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | Natural |
| Thread / Neck Size | Standard centrifuge tube thread — 24 mm neck |
| Tube Compatibility | Caplugs® Evergreen 15 mL centrifuge tubes; 240-3007 / 240-3010 7 mL transport vials |
| IATA P650 | Compliant — leak-free primary container seal |
| Cryogenic Storage | Compatible — −20°C and −80°C |
| Autoclave | Compatible — 121°C / 15 psi |
| Sterility | Non-Sterile |
| Pack Size | 1000 / Bag |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA (California) |
Applications
- Biological specimen transport: Threaded engagement satisfies the IATA P650 primary-container leak-free seal standard for human specimens shipped by air or courier.
- Biobank and biorepository archiving: HDPE cryogenic stability through −80°C freeze-thaw cycles makes these caps reliable for long-term specimen storage and cap replacement on archived centrifuge tubes.
- Clinical laboratory serum, plasma, and urine storage: HDPE inertness to standard clinical matrices and preservatives prevents leaching into precious specimen volumes during storage.
- Cell culture and pathogen propagation: Autoclave compatibility at 121°C allows caps to be pre-sterilized before use on capped centrifuge tube workflows.
- High-volume tube capping programs: Natural color is compatible with any labeling method — barcode, direct-print, or adhesive label — making these caps a universal default where color routing is not required.
Compatibility
These screw caps are designed to fit Caplugs® Evergreen 15 mL centrifuge tubes and the 240-3007 / 240-3010 family of 7 mL transport vials, engaging a standard 24 mm centrifuge tube neck thread. The higher crystallinity of HDPE relative to LDPE provides the thread-wall rigidity needed for consistent torque engagement, secure cap retention during centrifugation, and dimensional stability across repeated freeze-thaw cycles at −20°C and −80°C. If you are replacing caps on archived tubes from another manufacturer, verify that the tube neck thread and outer diameter conform to the standard 15 mL centrifuge tube specification before ordering in volume. The same cap is also offered in blue (300-3010-B2N), orange (300-3010-E2N), and green (300-3010-G2N) for color-coded specimen routing programs.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Serum, plasma, urine | Excellent |
| Dilute acids and bases | Excellent |
| Standard clinical preservatives | Excellent |
| Alcohols (ethanol, isopropanol) | Good — short-term contact |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
| Acetone | Not recommended |
Quality & Procurement
Made in USA (California), these Caplugs® Evergreen screw caps are produced from BPA-free, phthalate-free HDPE resin under ISO 9001 quality management. The natural color and inert resin chemistry ensure the caps introduce no contaminants or extractables into stored specimens — a critical requirement for biorepository and clinical chemistry programs. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory, with tiered volume pricing available for hospitals, research institutions, and biobank programs placing recurring orders.
Frequently Asked Questions
Are these screw caps sterile?
No — they are supplied non-sterile. However, HDPE is fully autoclavable at 121°C / 15 psi, so caps can be sterilized in-house before use in cell culture or pathogen-handling workflows that require a sterile closure.
Do these caps meet IATA requirements for shipping biological specimens?
Yes. The threaded screw-cap engagement provides the leak-free primary container seal required under the IATA P650 standard for transport of biological specimens by air and courier services.
Will these caps fit centrifuge tubes from other manufacturers?
These caps are sized for the standard 24 mm centrifuge tube neck thread used on Caplugs® Evergreen 15 mL centrifuge tubes and 240-3007 / 240-3010 transport vials. They may fit other brands that use the same standard thread, but dimensional verification against your specific tube is recommended before committing to a large purchase.
Are color-coded versions of this cap available?
Yes. The same HDPE screw cap is offered in blue (300-3010-B2N), orange (300-3010-E2N), and green (300-3010-G2N) for laboratories that route specimens by cap color. The natural version reviewed here is the all-purpose default for programs using barcode or label identification.