Screw Caps for Sample Tubes with External Threads (#6030-6059), Polyethylene — 1000/Case
The Globe Scientific Screw Cap for Sample Tubes with External Threads is engineered to pair with the #6030-6059 sample tube series, delivering a secure, leak-resistant closure for specimen storage, sample archiving, and routine aliquoting. Color-coded options streamline rack organization and reduce cross-sample errors at the bench.
Technical Specifications
| Product Type | Screw Cap for external-thread sample tubes (#6030-6059) |
| Volume/Size | Fits sample tube series #6030 through #6059 |
| Material | Polyethylene (PE) |
| Closure/Cap | External-thread screw cap, leak-resistant seal |
| Graduation | Not applicable |
| Sterility | Non-sterile |
| Pack Size | 1000 caps per case |
Available Colors
| Lilac — Bag of 1000 | 6136L |
| Gray — Bag of 1000 | 6136A |
Applications
- Sealing specimen and sample tubes for refrigerated or frozen storage
- Color-coding sample sets by patient, study arm, or assay protocol
- Securing aliquots during transport between lab departments
- Biobanking and long-term archival of serum, plasma, or buffer samples
- Re-closing tubes after sampling to limit evaporation and contamination
- Replacement caps for damaged or lost closures on #6030-6059 tubes
Chemical Resistance
| Aqueous buffers | Excellent |
| Dilute acids | Good |
| Dilute bases | Good |
| Alcohols | Good |
| Acetonitrile | Limited |
| Aromatic solvents | Poor |
| Chlorinated solvents | Poor |
Quality & Procurement
Shipping from US inventory, labsupplies.com is an authorized Globe Scientific dealer. Each case carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited labs.
Frequently Asked Questions
Which sample tubes do these caps fit?
They are designed for the external-thread sample tube series numbered #6030 through #6059. Confirm your tube SKU falls within that range before ordering replacement caps.
What material are the caps made from?
Caps are molded from polyethylene (PE), offering a flexible, leak-resistant seal suitable for aqueous samples, buffers, and most biological specimens.
Are these caps sterile?
No. They ship non-sterile in bulk cases. If a sterile workflow is required, decontaminate per your validated lab protocol prior to use.
How many caps come per pack?
Each case contains 1000 caps. Lilac (6136L) and Gray (6136A) are sold separately for color-coded organization.
