15 mL Centrifuge Tube Screw Caps with Sprockets — HDPE, Yellow, Non-Sterile, 1000/Bag (300-3022-Y20)
These replacement screw caps are designed to fit standard 15 mL centrifuge tubes and transport vials, providing a secure threaded closure with sprocket edges for confident finger grip during opening and closing. Molded from high-density polyethylene (HDPE) in a high-visibility yellow color, part number 300-3022-Y20 is supplied non-sterile in convenient 1000/Bag bulk packaging suited to high-throughput laboratory and clinical environments.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3022-Y20 |
| Compatible Tube Format | 15 mL Centrifuge Tube / Transport Vial |
| Closure Type | Screw Cap with Sprockets |
| Material | High-Density Polyethylene (HDPE) |
| Color | Yellow |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Recapping 15 mL centrifuge tubes during sample storage and transport
- Color-coded tube identification and workflow organization in multi-assay laboratories
- Specimen transport vial closure in clinical and diagnostic settings
- Bulk cap replacement for high-volume sample processing operations
- General liquid containment where a secure threaded closure is required
Material & Chemical Resistance
High-density polyethylene (HDPE) offers broad resistance to aqueous solutions, dilute acids and bases, alcohols, and many common biological buffers, making it a reliable choice for everyday laboratory liquid containment. HDPE is a rigid yet slightly flexible material that maintains its shape under normal handling stress. Note that HDPE is not recommended for autoclaving and may be affected by concentrated oxidizing acids and certain aromatic or chlorinated solvents at elevated temperatures.
Quality & Procurement
Made in USA, Caplugs® Evergreen screw caps are manufactured under ISO 9001 quality management from BPA-free, phthalate-free, latex-free resin. LabSupplies.com is an authorized dealer and ships from USA inventory, typically same business day for stocking items, with tiered pricing available for institutional and grant-funded laboratories.
Frequently Asked Questions
Are these caps sterile?
No — they are supplied non-sterile in 1000/Bag bulk packaging. If your workflow requires sterile closures, consider a gamma-irradiated alternative or treat caps according to your laboratory's validated decontamination procedures.
What is the purpose of the sprocket edges on the cap?
The sprocket (knurled or ribbed outer edge) provides an improved gripping surface, allowing laboratory personnel to apply or remove the screw cap securely even when wearing gloves or when hands are wet.
Can these caps be used with aromatic or chlorinated solvents?
HDPE has good general chemical resistance for aqueous samples, dilute acids and bases, and alcohols, but it is not recommended for prolonged contact with concentrated aromatic or chlorinated solvents, particularly at elevated temperatures. Verify compatibility with any non-aqueous reagents before use.