15 mL Centrifuge Tube & Transport Vial Screw Caps — Sterile HDPE, Green, 1000/Bag (222-3010-G2N)
These sterile green High-Density Polyethylene screw caps are designed for Caplugs® Evergreen transport vials and 15 mL centrifuge tubes, supplied in bulk 1000/Bag packaging for high-throughput clinical and research workflows. Part number 222-3010-G2N is materially and dimensionally identical to the natural HDPE cap (222-3010-02N) — the green color serves exclusively as a visual coding layer, allowing laboratory staff to distinguish tube sets by content, cohort, collection shift, or batch at a glance. The leak-resistant threaded seal and broad HDPE chemical compatibility make these caps equally suitable for specimen transport, cold storage, and multi-tube collection protocols.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 222-3010-G2N |
| Product Type | Screw Cap for Transport Vials / 15 mL Centrifuge Tubes |
| Material | High-Density Polyethylene (HDPE) |
| Color | Green |
| Color Purpose | Visual tube identification and color-coding |
| Sterility | Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalate / Latex | BPA-Free, Phthalate-Free, Latex-Free |
| FDA-Compliant Resin | Yes |
| Country of Origin | USA |
Applications
- Color-coded specimen collection: green cap designates a specific tube content, patient cohort, or collection time point across multi-tube workflows
- Transport vial capping: threaded, leak-resistant seal for Caplugs® Evergreen transport vials (222-3005, 222-3007, 222-3010 series)
- 15 mL conical tube capping: sterile caps for use in BSC workflows requiring visual tube differentiation
- Replacement cap supply: economical 1000/Bag quantity for replacing damaged or missing caps on existing tube inventory
- Batch and lot color coding: distinguish specimen batches processed in the same run from natural-capped (222-3010-02N) and blue-capped (222-3010-B2N) tubes
- Shift or time-point marking: assign green to a specific collection window in timed specimen series
- Cold storage and refrigerated transport: HDPE performs reliably at 2–8 °C under standard ice-pack or refrigerator conditions
Compatibility
These caps are threaded to fit Caplugs® Evergreen transport vials and 15 mL centrifuge tubes across the 222-3005, 222-3007, and 222-3010 tube series. The green cap (222-3010-G2N) shares the same HDPE material, thread specification, and dimensions as the natural cap (222-3010-02N) and the blue cap (222-3010-B2N), making all three colors interchangeable on the same tube formats. Laboratories that already stock natural or blue caps can introduce the green variant purely to expand their color-coding scheme without any change to fit or sealing performance.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent — HDPE inert across pH 2–12 |
| Serum / plasma / urine | Excellent — standard clinical matrix; low extractables |
| Transport media (UTM/VTM) | Excellent — compatible with standard transport media |
| Boric acid preservative | Excellent — compatible with standard urine transport preservatives |
| Dilute HCl / H₂SO₄ (<10%) | Excellent — compatible with acid preservatives |
| Methanol / ethanol (<50%) | Good — short-term contact acceptable |
| Cold storage (2–8 °C) | Excellent — standard refrigerator and ice-pack transport |
| Dichloromethane | Not compatible — causes swelling; do not use |
Quality & Procurement
Made in USA, these Caplugs® Evergreen screw caps are manufactured from FDA-compliant, BPA-free, phthalate-free, latex-free HDPE resin. Each cap ships sterile, ensuring readiness for specimen collection and transport applications without additional processing. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory — stocking items typically ship same business day, and tiered pricing is available for institutional, hospital, and grant-funded laboratory accounts.
Frequently Asked Questions
Are these caps supplied sterile?
Yes — the 222-3010-G2N caps are sterile as shipped, making them suitable for direct use in specimen collection and transport without additional decontamination steps.
What is the functional difference between the green cap and the natural or blue versions?
The green cap is materially and dimensionally identical to the natural (222-3010-02N) and blue (222-3010-B2N) HDPE caps. The color difference is purely visual and serves only to distinguish tube sets in multi-tube workflows — it does not affect fit, seal integrity, or chemical resistance.
Which tube formats do these caps fit?
These caps are designed to fit Caplugs® Evergreen transport vials and 15 mL centrifuge tubes in the 222-3005, 222-3007, and 222-3010 series. Verify thread compatibility with your specific tube before switching from another cap supplier.
Can these caps be used with urine transport preservatives such as boric acid?
Yes — HDPE is compatible with boric acid and dilute acid preservatives commonly used in urine transport and specimen preservation workflows.