Screw Cap for 18mm Vial 18-400 Solid
$1.00
Ensure airtight sample security with the 18-400 Solid Top PP Screw Cap from vialshop.com. Engineered to fit standard 18mm neck finish sample vials, this solid (closed-top) cap is constructed from premium polypropylene (PP) for high chemical resistance against solvents, acids, and alkalis. Its precision threading prevents sample evaporation, leakage, and atmospheric contamination, making it ideal for long-term storage, chemical packaging, and laboratory research.
The 18-400 Solid Top Screw Cap from vialshop.com offers a durable, leak-proof sealing solution for 18mm threaded laboratory and packaging vials. Formulated from high-purity polypropylene (PP), this closed-top cap provides an unyielding barrier against air, humidity, and chemical vapor—protecting your sensitive samples during transport or extended benchtop storage.
Whether you are storing environmental testing samples, chemical reagents, or biological compounds, this cap delivers reliable performance and tight seal integrity every time.
Key Features
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High-Purity Polypropylene (PP): Formulated for superior resistance against organic solvents, acids, alkalis, and common laboratory chemicals.
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Solid (Closed-Top) Security: Completely seals the vial opening to eliminate exposure to airborne contaminants and prevent sample evaporation.
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Leak-Proof Threading: Precision 18-400 thread engagement provides a tight, uniform seal under varying storage conditions.
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18mm Standard Fit: Perfect compatibility with standard 18mm neck glass and plastic storage vials.
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Tactile Ribbed Edge: Vertical outer knurling offers optimal grip for easy, manual tightening and removal—even when wearing nitrile gloves.
Technical Specifications
| Feature | Specification |
| Product Type | 18-400 Solid Top Screw Cap |
| Cap Size / Thread | 18mm (18-400 thread finish) |
| Cap Style | Closed Top / Solid Top |
| Material | Polypropylene (PP) |
| Compatibility | Standard 18mm neck vials & bottles |
| Grade | Standard Laboratory & Industrial Grade |
Common Applications
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Chemical Reagent Storage: Safely houses chemical solutions, organic compounds, and analytical reference standards.
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Environmental & Water Testing: Keeps field and laboratory liquid samples contained without risk of evaporation or cross-contamination.
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Industrial & Sample Transport: Prevents leaks and spills during transit or long-term archiving.
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