Globe Scientific
Flange Plug Caps, Red Polyethylene — 12, 13 & 16 mm Test Tube Closures, 1000/Case | Globe Scientific
Flange Plug Caps, Red Polyethylene — 12, 13 & 16 mm Test Tube Closures, 1000/Case | Globe Scientific
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Red Flange Plug Caps for 12, 13 & 16 mm Test Tubes — 1000/Case
These Globe Scientific Flange Plug Caps deliver a secure, push-in seal for round-bottom and culture tubes across three common diameters. Molded in red polyethylene for fast visual identification, they suit sample storage, specimen transport, and routine clinical or research tube closure where reliable retention matters at the bench.
Technical Specifications
| Product Type | Flange Plug Cap |
| Size (range across variants) | 12 mm, 13 mm, 16 mm tube ID |
| Material | Polyethylene |
| Closure/Cap | Flange plug, push-in |
| Color | Red |
| Sterility | Non-sterile |
| Pack Size | 1000 caps per case |
Available Sizes
| Size | SKU | Price (per case of 1000) |
| 12 mm | 118127R | $36.70 |
| 13 mm | 118240R | $37.00 |
| 16 mm | 116152R | $51.20 |
Applications
- Sealing serum and specimen tubes during cold or ambient storage
- Closing culture tubes for microbiology and media work
- Color-coded tube identification within mixed sample racks
- Capping centrifuge and round-bottom tubes after aliquoting
- Secure transport of capped samples between labs or departments
- General test tube closure for teaching and clinical bench protocols
Quality & Procurement
Order from labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Each case carries lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact us for volume quotes on standing protocols.
Frequently Asked Questions
Which tube diameter does each cap fit?
Each variant is sized to the tube inner diameter: 12 mm, 13 mm, or 16 mm. Match the cap size to your tube's bore for a snug flange plug seal; confirm tube ID against the manufacturer's spec before ordering.
Are these caps sterile?
No. The flange plug caps are supplied non-sterile. If your workflow requires sterility, validate an in-house autoclave or chemical sterilization step against polyethylene's temperature limits before use.
What material are the caps made from?
They are molded from polyethylene, a flexible plastic that provides a friction-fit closure and tolerates standard refrigerated and ambient storage. Polyethylene is not recommended for autoclave cycles at elevated temperatures.
How many caps come in a case?
Prices are per case of 1000 caps. The 12 mm case is $36.70, 13 mm is $37.00, and 16 mm is $51.20. Tiered pricing applies to larger institutional orders.
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