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 | $109.50 |
| Gray — Bag of 1000 | 6136A | $109.50 |
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. Institutional and grant-funded tiered pricing is available — contact our team for volume quotes on standing orders.
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 at $109.50 per case. Lilac (6136L) and Gray (6136A) are sold separately for color-coded organization.