15 mL Centrifuge Tube & Transport Vial Screw Caps — HDPE, Lavender, 1000/Bag (300-3010-L2N)
These lavender High-Density Polyethylene (HDPE) screw caps from Caplugs® Evergreen are designed to fit 15 mL centrifuge tubes and 7 mL transport vials, providing a threaded IATA P650-compliant leak-free closure for biological specimen transport and storage. Supplied non-sterile in 1000/Bag bulk packaging, part number 300-3010-L2N is validated for use across the full temperature range from -80°C cryogenic archiving through autoclave sterilization at 121°C, making it equally suited to biorepository programs, clinical specimen routing, and routine laboratory centrifugation. The lavender color follows the CLSI H3 convention for EDTA anticoagulant specimens, enabling instant visual differentiation of CBC, HbA1c, and molecular panel batches without relabeling.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3010-L2N |
| Cap Type | Screw cap — threaded engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | Lavender |
| 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 at -20°C and -80°C |
| Autoclave Compatibility | Compatible at 121°C / 15 psi |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA (California) |
Applications
- 15 mL centrifuge tube capping: Replacement or color-coded caps for Caplugs® Evergreen 15 mL centrifuge tubes; HDPE threads engage the standard centrifuge tube neck securely through spin cycles.
- Transport vial sealing: Screw-thread closure on the 240-3007 and 240-3010 7 mL transport vial family provides an IATA P650 leak-free primary container seal for biological specimen shipment.
- Color-coded specimen routing: Lavender aligns with the CLSI H3 convention for EDTA anticoagulant specimens (CBC, HbA1c, molecular panels), enabling reliable visual batch differentiation across multi-specimen workflows.
- Biobank and biorepository archiving: HDPE maintains thread engagement and cap integrity through repeated freeze-thaw cycling at -80°C, meeting the demands of long-term frozen aliquot programs.
- Capped centrifugation: The threaded engagement retains the cap through centrifuge forces during serum or plasma separation protocols.
- Autoclave sterilization: Caps withstand 121°C autoclave cycles, allowing sterilization of assembled tube-and-cap assemblies prior to specimen collection or media filling.
Compatibility
These caps are engineered for Caplugs® Evergreen 15 mL centrifuge tubes and the 240-3007 / 240-3010 family of 7 mL transport vials. The threaded geometry provides the torque engagement and cap retention required for both centrifugation and IATA P650-compliant specimen transport. Because thread dimensions can vary across tube manufacturers, LabSupplies.com recommends requesting a free sample to validate cap-to-tube fit before committing to a bulk order, particularly when replacing caps on non-Caplugs® Evergreen tubes.
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 | Excellent — maintains thread engagement through freeze-thaw cycles |
| Autoclave (121°C / 15 psi) | Compatible |
| Acetone / chlorinated solvents | Not recommended |
Quality & Procurement
Made in USA (California), Caplugs® Evergreen screw caps are manufactured from BPA-free, phthalate-free HDPE resin under ISO quality management standards. The high crystallinity of HDPE versus lower-density polyethylenes delivers the thread-wall rigidity required for consistent torque engagement across centrifugation, cryogenic storage, and autoclave sterilization in a single cap. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered volume pricing available for clinical laboratories, hospital systems, biobanks, and research institutions purchasing on institutional accounts or grant funding.
Frequently Asked Questions
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 manufacturers, so we strongly recommend requesting a free sample to confirm fit before placing a bulk order on third-party tubes.
Are these caps autoclavable?
Yes. The HDPE material is compatible with standard autoclave cycles at 121°C / 15 psi, making these caps suitable for sterilization of assembled tube-and-cap assemblies.
Why lavender? Is this a standard color code in the lab?
Lavender follows the CLSI H3 convention for EDTA anticoagulant specimen tubes. Using lavender caps on 15 mL centrifuge tubes and transport vials lets clinical and research staff immediately identify EDTA-processed batches — such as CBC, HbA1c, or molecular panel specimens — without additional labeling steps.
Can these caps be used for long-term frozen storage at -80°C?
Yes. HDPE maintains its structural integrity and threaded engagement through repeated freeze-thaw cycling at -80°C, which is why this cap is specifically suited to biorepository and biobank archiving programs that cycle specimens in and out of ultra-low temperature storage.