Caplugs® Evergreen
15 mL Centrifuge Tubes, Screw Caps, HDPE, Orange — 300-3010-E2N | 1000/Bag | Caplugs® Evergreen
15 mL Centrifuge Tubes, Screw Caps, HDPE, Orange — 300-3010-E2N | 1000/Bag | Caplugs® Evergreen
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Transport Vial and 15 mL Centrifuge Tube Screw Caps, HDPE, Orange — 300-3010-E2N | 1000/Bag
| Quick Reference — 300-3010-E2N | |
|---|---|
| Cap Type | Screw cap — threaded engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | Orange |
| Tube Compat. | 15 mL centrifuge tubes and 7 mL transport vials (Caplugs® Evergreen) |
| IATA P650 | ✓ Screw-thread provides leak-free transport closure |
| Cryo Storage | ✓ -20°C and -80°C compatible |
| Autoclave | ✓ Compatible (121°C / 15 psi) |
| Sterility | Non-Sterile |
| Pack Size | 1000 / Bag |
| Price | $67.50 / Bag ($0.0675 / cap) |
Technical Narrative
The Caplugs® Evergreen is a orange High-Density Polyethylene (HDPE) screw cap for 15 mL centrifuge tubes and 7 mL transport vials in the Caplugs® Evergreen product range. The threaded screw-cap engagement provides the positive leak-free closure required for IATA P650 biological specimen transport — the primary packaging standard for human specimens shipped by air and courier. HDPE is specified for screw-thread tube caps because its higher crystallinity versus LDPE delivers the thread-wall rigidity required for consistent torque engagement, cap retention during centrifugation, and dimensional stability through freeze-thaw cycling at -20°C and -80°C. Orange caps provide high-visibility STAT and priority routing — orange-capped transport vials or centrifuge tubes are immediately identifiable in specimen processing racks for urgent specimen routing without secondary labeling overhead.
HDPE's cryo stability at -80°C makes these caps suitable for biobank and biorepository programs replacing caps on archived centrifuge tubes or restoring caps to transport vials after specimen retrieval. Autoclave compatibility at 121°C enables pre-sterilized cap supply for cell culture and pathogen propagation programs using capped centrifuge tubes. HDPE chemical inertness to serum, plasma, urine, and standard clinical preservatives ensures no cap leaching into specimen contents during storage — an important property for biorepository programs archiving precious specimen volumes for future analysis.
At $67.50 per 1000/Bag — $0.0675 per cap — the delivers orange HDPE tube cap coverage at per-cap economics for high-volume tube capping and replacement programs. Also available: 300-3010-02N (Natural, $67.50); 300-3010-B2N (Blue, $67.50); 300-3010-G2N (Green, $67.50).
Technical Specifications — Caplugs® Evergreen
| Specification | Value |
|---|---|
| Part Number | |
| Caplugs Item # | 3003010E2NE1 |
| Cap Type | Screw cap — threaded tube engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | Orange |
| Tube Compat. | Caplugs® Evergreen 15 mL centrifuge tubes; 240-3007/240-3010 transport vials |
| Thread | Standard centrifuge tube thread — 24 mm neck |
| IATA P650 | ✓ Leak-free primary container seal for biological specimen transport |
| Cryo Storage | ✓ -20°C and -80°C — HDPE cryo stability |
| Autoclave | ✓ Compatible (121°C / 15 psi) |
| Sterility | Non-Sterile |
| Pack Size | 1000 / Bag |
| BPA/Phthalate | BPA-free; no phthalate plasticizers |
| Country of Origin | Made in U.S.A. (California) |
Application & Tube Compatibility — 300-3010 Screw Caps
The 300-3010 HDPE screw caps fit Caplugs® Evergreen 15 mL centrifuge tubes and 7 mL transport vials for the following workflows:
| Application | Tube / Vial Type | Notes |
|---|---|---|
| 15 mL centrifuge tube capping | Replacement caps for Caplugs® 15 mL centrifuge tubes | HDPE threads engage standard 15 mL centrifuge tube neck |
| Transport vial sealing | 240-3007 / 240-3010 7 mL transport vial family | Screw-thread provides IATA P650-compliant leak-free transport seal |
| Specimen transport | Serum, plasma, urine transport in capped tubes | HDPE cap seals tube for courier and pneumatic transport |
| Color-coded specimen routing | Multi-specimen batch differentiation by cap color | Color caps enable visual routing without secondary tube labels |
| Frozen specimen archiving | -20°C and -80°C tube archiving | HDPE maintains cap engagement through freeze-thaw cycling |
| Centrifugation (capped) | Capped centrifuge tube spin for serum separation | Screw-thread retains cap through centrifuge forces |
| Biobank aliquot capping | Replacement caps for biorepository archived tubes | HDPE cap compatible with long-term frozen archive conditions |
| Replacement cap program | Lost or damaged cap replacement for existing tubes | Standardized HDPE thread fits Caplugs® centrifuge tube neck |
Always validate cap-to-tube thread fit with a sample before bulk purchase. Request a free sample to confirm thread engagement and torque retention before committing to volume.
Chemical Resistance — High-Density Polyethylene (HDPE)
HDPE provides superior rigidity and chemical resistance versus LDPE for screw-thread cap applications — HDPE's higher density and crystallinity deliver consistent thread engagement, cryo stability, and autoclave compatibility for demanding tube cap workflows.
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / water | ✓ Excellent |
| Serum / plasma / urine | ✓ Excellent |
| Short-chain alcohols (brief) | ✓ Good |
| Dilute acids (<10%) | ✓ Good |
| Dilute alkalies (pH <12) | ✓ Good |
| DMSO (≤10%) | ✓ Good |
| Storage at -20°C / -80°C | ✓ Suitable — HDPE cryo stability |
| Autoclave (121°C) | ✓ Compatible |
| Concentrated organic solvents | ✗ Not recommended |
Complete 300-3010 Color Range
All five colors are identical HDPE thread specification — color selection is protocol-driven:
| Part Number | Color | Price/1000 | Primary Use |
|---|---|---|---|
| 300-3010-02N | Natural | $67.50 | General purpose / label-based ID |
| 300-3010-B2N | Blue | $67.50 | Citrate anticoagulant / blue-top convention |
| Orange | $67.50 | STAT / priority specimen routing | |
| 300-3010-G2N | Green | $67.50 | Specimen-type or batch designation |
| 300-3010-K2N | Fuchsia | $67.50 | GYN / anatomic pathology designation |
Laboratory Applications
The serves biorepository and biobank programs replacing caps on archived 15 mL centrifuge tubes and transport vials; clinical specimen transport programs using color-coded caps for specimen-type routing; cell biology and virology labs capping centrifuge tubes for culture and propagation; reference laboratory programs managing large-volume transport vial inventories; and any workflow requiring HDPE screw-cap closure on 15 mL centrifuge tubes or 7 mL transport vials.
U.S. Manufacturing, Quality & Institutional Procurement
Every Caplugs® Evergreen lot is precision-molded at our California manufacturing facility and subject to rigorous dimensional inspection and material purity verification. We supply reference laboratories, hospital systems, biotech firms, and federal procurement offices under institutional pricing programs with blanket-order support and same-day shipping on stocked inventory. Request a free sample below to validate fit before committing to volume.
Frequently Asked Questions — Caplugs® Evergreen
Which Caplugs® Evergreen tubes are compatible with the 300-3010 screw caps?
The 300-3010 HDPE screw caps are designed for Caplugs® Evergreen 15 mL centrifuge tubes (240-2448, 240-2469 families) and 7 mL transport vials (240-3007, 240-3010 families). They serve as replacement or color-coded alternate caps for these tube formats. Always validate cap-to-tube thread engagement with a sample set before bulk purchase — request a free sample to confirm fit.
When should I use Orange caps versus Natural caps for transport vials?
Natural (300-3010-02N) and Orange caps are identical in HDPE material and thread specification. Orange caps provide high-visibility STAT and priority routing — orange-capped transport vials or centrifuge tubes are immediately identifiable in specimen processing racks for urgent specimen routing without secondary labeling overhead. Choose Natural for universal use with barcode/label identification; choose Orange when visual color-coded routing is a workflow requirement.
Are the HDPE caps compatible with -80°C frozen storage and autoclave sterilization?
Yes to both. HDPE maintains cap engagement and dimensional stability at -80°C ultra-low temperature — suitable for biobank and biorepository programs archiving capped tubes at -80°C. HDPE is also autoclave-compatible at 121°C / 15 psi for pre-sterilized cap supply. This combination of cryo stability and autoclave compatibility is why HDPE is specified for screw-thread tube caps rather than LDPE (which is not autoclave-compatible) or PS/PP (which may not maintain thread geometry at -80°C).
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