15 mL Centrifuge Tube & Transport Vial Screw Caps — HDPE, White, 1000/Bag (300-3010-W2N)
These white High-Density Polyethylene screw caps from Caplugs® Evergreen are designed to seal 15 mL centrifuge tubes and 7 mL transport vials with a leak-free threaded engagement that meets IATA P650 requirements for biological specimen transport. Supplied non-sterile in 1000/Bag, they are rated for cryogenic storage at -20°C and -80°C as well as autoclave sterilization at 121°C, making them suitable across the full lifecycle of a clinical or biorepository specimen — from collection through archival freezing. The white surface provides maximum contrast for adhesive barcode labels and LIS-printed identification, a practical advantage in high-throughput reference and clinical laboratory environments.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3010-W2N |
| Cap Type | Screw cap — threaded engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | White |
| Tube Compatibility | 15 mL centrifuge tubes; 240-3007 / 240-3010 7 mL transport vials (Caplugs® Evergreen) |
| IATA P650 Compliance | Yes — leak-free primary container seal |
| Cryogenic Storage | Compatible — -20°C and -80°C |
| Autoclave Compatibility | Compatible — 121°C / 15 psi |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA |
Applications
- Capping 15 mL centrifuge tubes for serum separation spins, where screw-thread engagement retains the cap through centrifuge forces
- Sealing Caplugs® Evergreen 240-3007 and 240-3010 7 mL transport vials for IATA P650-compliant biological specimen shipment
- Color-coded specimen routing in multi-specimen batch workflows, following CLSI cap-color conventions for visual differentiation
- Replacement or supplemental caps for biorepository archive tubes stored at -20°C or -80°C through extended freeze-thaw cycling
- Autoclave sterilization of capped tubes at 121°C prior to use in sterile processing or controlled-environment workflows
Compatibility
These caps are validated for use with Caplugs® Evergreen 15 mL centrifuge tubes and the 240-3007 / 240-3010 family of 7 mL transport vials. The HDPE threaded geometry engages the standard 15 mL centrifuge tube neck to deliver a secure closure through centrifugation, cryogenic freezing, and autoclave cycles. Because thread dimensions can vary across tube manufacturers, Caplugs® Evergreen recommends confirming cap-to-tube thread fit with a sample set before committing to a bulk order — LabSupplies.com can facilitate a sample request before purchase.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / serum / plasma | Excellent |
| Short-chain alcohols (brief contact) | Good |
| Dilute acids (<10%) | Good |
| DMSO (≤10%) | Good |
| Storage at -20°C / -80°C | Suitable — HDPE maintains thread engagement through freeze-thaw cycles |
| Autoclave (121°C) | Compatible |
| Concentrated aromatic / chlorinated solvents | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen caps are manufactured from BPA-free, phthalate-free HDPE resin under ISO quality management. The higher crystallinity of HDPE versus low-density polyethylene delivers the thread-wall rigidity needed for consistent torque engagement and cap retention across the full performance range — centrifugation, cryogenic archiving, and autoclave sterilization. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory; tiered volume pricing is available for clinical labs, hospital systems, and biorepository programs with high annual cap consumption.
Frequently Asked Questions
Are these caps sterile?
No — they are supplied non-sterile in 1000/Bag bulk packaging. If sterile caps are required for your workflow, autoclave compatibility at 121°C / 15 psi means they can be sterilized in-house prior to use.
Will these caps fit centrifuge tubes from other manufacturers?
These caps are validated for Caplugs® Evergreen 15 mL centrifuge tubes and 240-3007 / 240-3010 transport vials. Thread dimensions vary across tube brands, so it is strongly recommended to verify fit with a sample before placing a bulk order — contact LabSupplies.com to request samples.
Why choose white caps over other colors in the 300-3010 range?
White provides the highest-contrast background for adhesive barcode labels and LIS-printed specimen identification, making it the preferred choice for reference laboratories and biorepository programs where label readability and scanner reliability are critical to specimen routing.
Can these caps be used for frozen specimen archiving at -80°C?
Yes. HDPE maintains its dimensional stability and thread engagement through repeated freeze-thaw cycles at -80°C, which is why this cap is suitable for long-term biorepository and biobank archival programs.