15 mL Centrifuge Tube & Transport Vial Screw Caps with Sprocket Grip — HDPE, Blue, 1000/Bag (300-3022-B20)
These blue HDPE screw caps feature a raised sprocket grip skirt that provides consistent one-hand finger torque for high-throughput capping and uncapping of 15 mL centrifuge tubes and 7 mL transport vials. Part number 300-3022-B20 shares the same thread profile as the plain 300-3010 cap series, adding sprocket ridges that prevent glove slip during rapid specimen processing and engage automated tube-capping instrument torque heads for repeatable closure force across large batches. Each bag contains 1,000 caps, making them a practical consumable for clinical laboratories, biorepositories, and research facilities with high daily tube volumes.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3022-B20 |
| Cap Type | Screw cap with sprocket grip skirt |
| Sprocket Feature | Raised ridges on skirt for tactile one-hand finger torque |
| Material | High-Density Polyethylene (HDPE) |
| Color | Blue |
| Sterility | Non-Sterile |
| Tube Compatibility | 15 mL centrifuge tubes; 7 mL transport vials (240-3007 / 240-3010) |
| Cryogenic Storage | Compatible to −80°C |
| Autoclavable | Yes — 121°C / 15 psi |
| IATA P650 | Leak-free primary container seal |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Pack Size | 1000/Bag |
| Country of Origin | USA (California) |
Applications
- High-throughput clinical specimen processing where tubes are capped and uncapped rapidly with nitrile-gloved hands — sprocket ridges prevent glove slip and under-torqued closures
- Automated tube-capping workflows where sprocket ridges engage instrument torque heads for consistent, repeatable closure force across entire batches
- Biorepository and frozen sample storage at −80°C, where the sprocket grip provides the tactile purchase needed to torque and remove caps without damaging tubes
- Coagulation and citrate specimen batches in color-coded processing workflows, mirroring the CLSI H3 blue color convention
- IATA P650-compliant primary container sealing for transport of biological specimens and clinical samples
Compatibility
These caps are designed to fit Caplugs® Evergreen 15 mL centrifuge tubes and the 240-3007 and 240-3010 series 7 mL transport vials. The thread geometry is identical to the plain 300-3010 blue cap series, so facilities already using those caps can transition to the sprocket variant without changing tube stock — the only difference is the raised sprocket skirt that improves grip performance in gloved-hand and automated-capping environments. Confirm thread compatibility with any non-Caplugs® Evergreen tubes before committing to large procurement quantities.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers and saline | Excellent |
| Dilute acids and bases | Excellent |
| Alcohols (ethanol, isopropanol) | Good — suitable for most lab concentrations |
| Biological specimens (serum, plasma, urine) | Excellent |
| Many organic solvents (hexane, mineral oils) | Good |
| Aromatic solvents (toluene, xylene) | Not recommended |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
Quality & Procurement
Made in USA at Caplugs® Evergreen's California facility, these caps are manufactured from BPA-free, phthalate-free HDPE resin and are IATA P650 validated for leak-free transport of biological primary containers. LabSupplies.com is an authorized Caplugs® Evergreen dealer stocking this cap in USA inventory, with same-business-day shipping available on stocking items and tiered volume pricing for institutional, hospital, and grant-funded procurement accounts.
Frequently Asked Questions
What is the difference between these sprocket caps and the plain 300-3010 blue caps?
Both caps share the same HDPE thread geometry and fit the same tubes, but this cap adds raised ridges around the skirt that provide a tactile grip surface. This makes a meaningful difference in high-throughput settings where technicians cap and uncap tubes rapidly with gloved hands, and in automated capping instruments where the sprocket profile engages the torque head for consistent closure force.
Are these caps compatible with automated tube-capping instruments?
Yes — the sprocket ridges are specifically designed to engage the torque heads of automated tube-capping instruments, enabling repeatable closure force across all tubes in a batch. If you are evaluating these for a specific capping platform, contact your instrument manufacturer to confirm torque head compatibility with the sprocket profile.
Can these caps be used for cryogenic storage at −80°C?
Yes. The HDPE material and cap geometry are rated for storage at −80°C, making these caps suitable for biorepository applications. The sprocket grip is especially useful in frozen storage environments, where caps at very low temperatures can be harder to remove with gloved hands.
Are these caps sterile, and can they be autoclaved?
The caps are supplied non-sterile but are autoclavable at 121°C / 15 psi, so they can be sterilized in-house before use in sterility-sensitive workflows. For applications requiring certified sterility, consult your quality requirements before autoclaving in bulk.