Screw Caps for Externally Threaded Sample Tubes (6030–6059), HDPE, 6 Colors, 1000/Case
These Globe Scientific Screw Caps are engineered to fit externally threaded sample tubes in the 6030–6059 series, delivering a secure, leak-resistant closure for sample storage, specimen archiving, and biobanking workflows. Six color options let labs implement quick visual sorting by study arm, patient cohort, or sample type, reducing handling errors at the bench and in freezer racks.
Technical Specifications
| Product Type | Screw Cap (for externally threaded sample tubes) |
| Compatible Tubes | Globe Scientific 6030–6059 series |
| Material | HDPE |
| Closure/Cap | Screw thread, single-use |
| Sterility | Non-sterile |
| Pack Size | 1000 caps per case |
Available Colors
| Color | SKU | Price (per case) |
| Yellow — Bag of 1000 | 6136Y | $109.50 |
| White — Bag of 1000 | 6136W | $109.50 |
| Red — Bag of 1000 | 6136R | $109.50 |
| Orange — Bag of 1000 | 6136N | $109.50 |
| Green — Bag of 1000 | 6136G | $109.50 |
| Blue — Bag of 1000 | 6136B | $109.50 |
Applications
- Sealing externally threaded sample tubes for long-term specimen storage
- Color-coding cohorts, study arms, or visit timepoints in clinical research
- Biobanking and freezer-rack organization at −20 °C and −80 °C
- Aliquoting serum, plasma, or buffer for downstream assays
- Sorting environmental or QC samples across a high-throughput batch
- Distinguishing reagent stocks during multi-step molecular protocols
Chemical Resistance
| Reagent Class | Compatibility |
| Aqueous buffers | Excellent |
| Dilute acids | Good |
| Dilute bases | Good |
| Alcohols | Good |
| Acetonitrile | Limited |
| Aromatic solvents | Poor |
| Chlorinated solvents | Poor |
Quality & Procurement
labsupplies.com is an authorized Globe Scientific dealer shipping from US inventory. Every case carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available; contact our procurement team for volume quotes and standing-order setup.
Frequently Asked Questions
Which tubes do these screw caps fit?
They are designed for Globe Scientific externally threaded sample tubes in the 6030–6059 series. Pair the cap with the matching tube to ensure a proper thread engagement and leak-resistant seal.
What material are the caps made from?
The caps are molded from HDPE, which offers strong resistance to aqueous buffers, dilute acids, and dilute bases, plus good performance with alcohols. Avoid prolonged exposure to aromatic and chlorinated solvents.
Are these caps suitable for freezer storage?
Yes. HDPE caps perform well at −20 °C and −80 °C, making them suitable for biobanking and long-term specimen archiving when paired with compatible tubes.
How are the caps packaged and sold?
Each SKU ships as a case of 1000 caps in a single color at $109.50 per case. Mix colors across SKUs to build a color-coding scheme for your workflow.