DURAN WHEATON Screw Cap 240418
The DURAN WHEATON Screw Cap 240418 is a premium-quality autoclavable black phenolic cap featuring a PTFE-faced rubber liner, designed for 24-400 threaded sample vials.
This closure offers a chemically inert, leak-proof, and heat-resistant seal, making it ideal for laboratories handling sensitive, reactive, or high-purity samples.
Manufactured by DWK Life Sciences (Germany), the 240418 cap ensures exceptional durability, precise fit, and long-term chemical compatibility in demanding laboratory environments.
Key Features
Autoclavable Design – Suitable for repeated sterilization up to 121 °C without deformation or liner degradation.
PTFE-Faced Rubber Liner – Virgin PTFE film bonded to 14B white SBR rubber for a non-reactive surface and tight, contamination-free seal.
Phenolic Construction – Black thermoset resin offers superior resistance to heat, pressure, and aggressive solvents.
Standard 24-400 Thread – Compatible with a wide range of laboratory vials, jars, and bottles with 24-400 thread finish.
Reliable Laboratory Quality – Manufactured by DWK Life Sciences (WHEATON®), known for world-class precision and quality standards.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand | DURAN / WHEATON – DWK Life Sciences |
| Model / Catalog No. | 240418 |
| Product Type | Screw Cap for Sample Vials |
| Cap Thread Size | 24-400 |
| Material (Cap) | Black Phenolic (Thermoset Resin) |
| Material (Liner) | PTFE-faced Rubber (14B Styrene-Butadiene Rubber / SBR) |
| Color | Black Cap with White PTFE Liner |
| Closure Type | Screw-Type Closure |
| Autoclavable | Yes – up to 121 °C |
| Chemical Resistance | Excellent against organic solvents, acids, and aqueous solutions |
| Sterilization Method | Steam Autoclave / Dry-Heat Sterilization |
| Country of Origin | Germany |
| Packaging | Typically 200 pcs per case (may vary by supplier) |
Applications
Safe sealing of analytical, chemical, and biological samples
Ideal for reagents requiring inert PTFE contact surface
Used in pharmaceutical, biotechnological, and QA/QC laboratories
Suitable for autoclaved and contamination-sensitive processes
Product Advantages
Provides inert, airtight, and contamination-free sealing for critical samples.
PTFE-faced liner prevents chemical reactions, absorption, or leaching.
Highly resistant to solvents, acids, and high temperatures.
Compatible with all 24-400 standard vials used in laboratories worldwide.
Supported by DWK Life Sciences precision manufacturing, ensuring consistent quality and durability.
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