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STOPPERS AND CLOSURES FOR LABORATORY CONTAINERS

Stoppers and closures create sealed systems that isolate contents within laboratory containers. Inserted or threaded designs form barriers to gases, liquids, and contaminants. Material elasticity and fit govern sealing pressure and permeability. These factors determine containment integrity, evaporation control, and sample stability.
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Stoppers and Closures

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19 Items

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  1. Nalgene™ Carboy Replacement Screw Closures and Gaskets
    Nalgene™ Carboy Replacement Screw Closures and Gaskets
    As low as $37.39
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  2. Nalgene™ Narrow-Mouth and Wide-Mouth Bottle Replacement Closures
    Nalgene™ Narrow-Mouth and Wide-Mouth Bottle Replacement Closures
    As low as $20.71
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  3. Nalgene™ Colored Polypropylene Closures with 38-430 Finish
    Nalgene™ Colored Polypropylene Closures with 38-430 Finish
    As low as $133.28
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  5. Nalgene™ Colored Polypropylene Closures with 28-415 Finish
    Nalgene™ Colored Polypropylene Closures with 28-415 Finish
    As low as $209.44
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  6. Nalgene™ Colored Polypropylene Closures with 24-415 Finish
    Nalgene™ Colored Polypropylene Closures with 24-415 Finish
    As low as $345.58
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  7. Nalgene™ Colored Polypropylene Closures with 20-415 Finish
    Nalgene™ Colored Polypropylene Closures with 20-415 Finish
    As low as $535.98
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  8. Nalgene™ Colored Polypropylene Closures: Bulk Pack
    Nalgene™ Colored Polypropylene Closures: Bulk Pack
    As low as $505.52
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  9. Nalgene™ Septum Closures: Sterile, Bulk Pack, 38-430mm
    Nalgene™ Septum Closures: Sterile, Bulk Pack, 38-430mm
    As low as $548.35
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  10. Nalgene™ HDPE Closures: Sterile, Bulk Pack
    Nalgene™ HDPE Closures: Sterile, Bulk Pack
    As low as $56.45
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  11. Nalgene™ Closures for Dropper Bottles: Bulk Pack
    Nalgene™ Closures for Dropper Bottles: Bulk Pack
    As low as $355.10
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  12. Heat-Shrink Bands for Nalgene™ PETG Media Bottles
    Heat-Shrink Bands for Nalgene™ PETG Media Bottles
    As low as $235.14
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  13. OFFICIAL THERMOFISHER SUPPLIER

    McQueen Labs is an authorized Thermo Fisher Scientific distributor, offering factory-direct lab equipment with full manufacturer warranties for trusted performance and reliability.

    As an official Thermo Fisher Scientific Independent Channel Partner, McQueen Labs delivers genuine Thermo Scientific products with expert support, ensuring quality and peace of mind for research and clinical laboratories.

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  14. Nalgene HDPE Tamper Evident Closures, Sterile, Bulk-Pack
    Nalgene™ HDPE Tamper Evident Closures, Sterile, Bulk-Pack
    $135.19
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  15. Nalgene Sterile Polypropylene Biotainer Replacement Closures
    Nalgene™ Sterile Polypropylene Biotainer Replacement Closures
    $1,345.60
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  16. Nalgene Mason Jar Replacement Closures
    Nalgene™ Mason Jar Replacement Closures
    $61.26
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  17. Nalgene Rubber Stopper, for Vacuum Manifold
    Nalgene™ Rubber Stopper, for Vacuum Manifold
    $53.14
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  18. Nalgene Polypropylene Fluid-Transfer Closure
    Nalgene™ Polypropylene Fluid-Transfer Closure
    $82.15
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  19. Nalgene Autoclavable Septum Closure, Autoclavable, 38-430 size
    Nalgene™ Autoclavable Septum Closure, Autoclavable, 38-430 size
    $65.88
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  20. Nalgene Polypropylene Pour Spout
    Nalgene™ Polypropylene Pour Spout
    $159.19
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  21. Nalgene Centrifuge Bottle Sealing Cap Assembly
    Nalgene™ Centrifuge Bottle Sealing Cap Assembly
    $61.14
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Frequently Asked Questions

How do perforated stoppers function in laboratory setups?
Perforated stoppers contain one or more holes that allow insertion of tubing, thermometers, or probes while maintaining a sealed environment. They are commonly used in distillation or gas transfer setups. This design enables controlled flow or measurement without compromising containment.
What factors should be considered when selecting stoppers and closures?
Key considerations include container size and neck dimensions, material compatibility, temperature resistance, and sealing performance. The application, such as storage or reaction containment, also influences selection. Proper fit and material choice ensure effective sealing and safe operation.
Can stoppers and closures be reused in laboratory environments?
Many stoppers and closures can be reused if properly cleaned and inspected for wear or degradation. Reusable materials such as silicone or glass can withstand repeated use, while some plastics may degrade over time. Reuse depends on application requirements and contamination risk.
How should stoppers and closures be cleaned and maintained?
Cleaning involves washing with appropriate laboratory detergents and rinsing thoroughly to remove residues. Some materials can be autoclaved or sterilized depending on their properties. Regular inspection for cracks, deformation, or chemical damage ensures continued sealing performance.
What role do closures play in maintaining sample integrity?
Closures prevent contamination, evaporation, and exposure to environmental conditions such as humidity or air. A proper seal ensures that samples remain stable and unchanged during storage or processing. This is critical for maintaining accurate and reproducible results in laboratory workflows.
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