15 mL Centrifuge Tube & Transport Vial Screw Caps — HDPE, Yellow, 1000/Bag (300-3010-Y2N)
These yellow 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 closure that meets IATA P650 requirements for biological specimen transport. Supplied non-sterile in bulk 1000/Bag quantities, they support the full range of demanding lab environments — from cryogenic storage at −80°C to autoclave sterilization at 121°C. The yellow color follows established CLSI convention for blood culture, SPS-anticoagulated, and ACD specimen workflows, enabling reliable visual differentiation across multi-specimen batches.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3010-Y2N |
| Cap Type | Screw cap — threaded engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | Yellow |
| Tube Compatibility | Caplugs® Evergreen 15 mL centrifuge tubes; 240-3007 / 240-3010 7 mL transport vials |
| IATA P650 | 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
- Replacement or color-coded capping for Caplugs® Evergreen 15 mL centrifuge tubes in clinical and research workflows
- Leak-free sealing of 240-3007 / 240-3010 7 mL transport vials for IATA P650-compliant biological specimen transport
- Color-coded specimen routing in multi-batch workflows using CLSI-convention yellow for blood culture, SPS, and ACD tube designation
- Biobank and biorepository aliquot capping requiring cryogenic stability through repeated −80°C freeze-thaw cycles
- Capped centrifugation for serum separation, where the screw-thread provides reliable cap retention through centrifuge forces
- Autoclave sterilization of capped tubes at 121°C for microbiological or sterility-critical applications
Compatibility
These caps are engineered to fit the threaded neck of Caplugs® Evergreen 15 mL centrifuge tubes and the 240-3007 / 240-3010 family of 7 mL transport vials. The higher crystallinity of HDPE versus low-density polyethylene provides the thread-wall rigidity needed for consistent torque engagement and cap retention across centrifugation, cryogenic archiving, and autoclave cycles. Because thread dimensions can vary across tube manufacturers, it is strongly recommended to validate fit with a sample set before committing to a bulk purchase — LabSupplies.com can coordinate sample requests on your behalf.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers, serum, plasma | Excellent |
| Short-chain alcohols — brief contact | Good |
| Dilute acids (<10%) | Good |
| DMSO (≤10%) | Good |
| Cryogenic storage (−20°C / −80°C) | Suitable — HDPE cryo stable |
| Autoclave (121°C) | Compatible |
| Chlorinated / aromatic solvents | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen screw caps are manufactured from BPA-free, phthalate-free HDPE resin under ISO 9001 quality management. The IATA P650-compliant closure design supports regulated specimen transport programs, and the cryo and autoclave ratings make these caps suitable for the most demanding biorepository and clinical lab environments. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with tiered volume pricing available for hospitals, reference labs, and research institutions purchasing at scale.
Frequently Asked Questions
Will these caps fit centrifuge tubes from other manufacturers?
These caps are validated against Caplugs® Evergreen 15 mL centrifuge tubes and the 240-3007 / 240-3010 transport vial family. Thread dimensions differ across brands, so you should confirm fit with a physical sample before switching from another supplier's caps. Contact us to request samples prior to a bulk order.
Are these caps sterile?
No — they are supplied non-sterile in 1000/Bag bulk packaging. If sterility is required for your application, the caps can be autoclaved at 121°C / 15 psi prior to use.
Why yellow? Does the color follow a standard convention?
Yellow aligns with the CLSI H3 color convention used to designate blood culture, SPS-anticoagulated, and ACD specimen tubes. Using yellow caps in these workflows allows clinical and research staff to route and identify specimen batches visually without relabeling, reducing handling errors at the bench.
Can these caps be used for long-term frozen storage at −80°C?
Yes. HDPE maintains thread engagement and dimensional stability through repeated freeze-thaw cycles at −80°C, making these caps appropriate for biobank and biorepository archiving programs. Always verify fit and seal integrity on your specific tube format before committing to long-term archive storage.