15 mL Centrifuge Tube & Transport Vial Screw Caps — HDPE, Blue, 1000/Bag (300-3010-B2N)
These blue High-Density Polyethylene (HDPE) screw caps from Caplugs® Evergreen are designed to seal 15 mL centrifuge tubes and 7 mL transport vials (240-3007/240-3010 series) with a leak-free threaded closure that meets IATA P650 requirements for primary biological specimen packaging. Supplied non-sterile in 1000/Bag bulk packaging, part number 300-3010-B2N is autoclave-compatible at 121°C and rated for cryogenic storage at -20°C and -80°C, making it equally at home in high-throughput clinical labs, biobank programs, and cell culture workflows.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3010-B2N |
| Cap Type | Screw cap — threaded engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | Blue |
| Thread / Neck Size | Standard centrifuge tube thread — 24 mm neck |
| Compatible Tubes / Vials | Caplugs® Evergreen 15 mL centrifuge tubes; 240-3007 / 240-3010 7 mL transport vials |
| IATA P650 Compliance | Yes — leak-free primary container seal for biological specimen transport |
| Cryogenic Storage | -20°C and -80°C compatible |
| Autoclave Compatibility | Yes — 121°C / 15 psi |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA (California) |
Applications
- Replacement cap supply for Caplugs® Evergreen 15 mL centrifuge tubes in routine clinical and research workflows
- Leak-free sealing of 240-3007 / 240-3010 7 mL transport vials for IATA P650-compliant air and courier shipment of human biological specimens
- Coagulation specimen management (PT, aPTT panels) — blue color aligns with CLSI H3 blue-top sodium citrate anticoagulant convention for easy batch identification in multi-specimen transport racks
- Biobank and biorepository archiving — HDPE cryostability at -80°C makes these caps suitable for long-term frozen storage of serum, plasma, and urine aliquots
- Cell culture and pathogen propagation — autoclave compatibility allows pre-sterilized cap supply for programs requiring sterile capped centrifuge tubes
- Cap replacement and restoration programs for archived centrifuge tubes retrieved from cryogenic storage
Compatibility
These screw caps thread directly onto Caplugs® Evergreen 15 mL centrifuge tubes via the standard 24 mm centrifuge tube neck, and seal the 240-3007 and 240-3010 families of 7 mL transport vials. The threaded engagement geometry delivers the torque retention needed to maintain a positive seal through centrifugation, freeze-thaw cycling, and IATA P650 transport — providing a reliable like-for-like replacement whenever OEM caps are lost, damaged, or needed in larger quantities than the original tube packaging provides. For labs that use color coding to segregate specimen types, blue is also available alongside Natural (300-3010-02N), Orange (300-3010-E2N), and Green (300-3010-G2N) variants in the same 300-3010 series.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Serum, plasma, urine | Excellent |
| Dilute acids and bases | Good |
| Standard clinical preservatives (EDTA, citrate, heparin solutions) | Excellent |
| Alcohols (short-term contact) | Good |
| Chlorinated / aromatic solvents (chloroform, toluene) | Not recommended |
| Acetone / ketones | Not recommended |
Quality & Procurement
Made in USA (California), these HDPE screw caps are manufactured by Caplugs® Evergreen from BPA-free, phthalate-free resin under ISO 9001 quality management. HDPE's higher crystallinity compared to LDPE provides the thread-wall rigidity necessary for consistent torque engagement, dimensional stability through freeze-thaw cycling, and cap retention under centrifugation forces — properties critical to both laboratory safety and specimen integrity. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered pricing available for high-volume institutional, hospital, and biorepository purchasing programs.
Frequently Asked Questions
Are these caps sterile out of the bag?
No — the 300-3010-B2N caps are supplied non-sterile. However, they are autoclave-compatible at 121°C / 15 psi, so labs requiring sterile caps can process them in-house before use.
Will these caps fit centrifuge tubes from other manufacturers?
These caps are designed and validated to fit Caplugs® Evergreen 15 mL centrifuge tubes and 240-3007/240-3010 7 mL transport vials using the standard 24 mm centrifuge tube thread. Fit on third-party tubes depends on whether those tubes use the same thread standard; we recommend confirming thread dimensions against your specific tubes before committing to a large order.
Are these caps suitable for shipping patient specimens by air courier?
Yes — the threaded screw-cap closure provides the leak-free primary container seal required under IATA P650, the primary packaging standard for human biological specimens shipped by air and courier services.
Why are the caps blue? Does the color affect performance?
Color is a visual differentiation aid only and does not affect chemical resistance or mechanical performance. Blue is conventionally associated with sodium citrate anticoagulant tubes under CLSI H3 guidelines, making it a natural choice for coagulation specimen workflows (PT, aPTT) and for color-coded batch separation in multi-specimen transport racks. The same cap is available in Natural, Orange, and Green for labs that use a broader color-coding scheme.