DURAN WHEATON Screw Cap W239298
The DURAN WHEATON Screw Cap W239298 is a premium black phenolic cap with a white rubber liner, designed for 20-400 threaded sample vials.
This cap offers a tight, heat-resistant, and chemically stable seal, making it ideal for demanding laboratory, pharmaceutical, and analytical applications.
Manufactured by DWK Life Sciences (Germany), it provides long-lasting durability, excellent thermal resistance, and compatibility with a wide range of sample containers.
Key Features
Autoclavable Design – Can be sterilized by autoclave up to 121 °C without deformation or loss of sealing integrity.
Durable Phenolic Material – Constructed from black thermoset resin for superior heat and solvent resistance.
Rubber Liner (SBR) – White styrene-butadiene rubber liner ensures leak-proof closure and maintains sample integrity.
Standard 20-400 Thread – Compatible with most laboratory vials and bottles using 20-400 thread finish.
Precision Engineering – Produced by DWK Life Sciences (WHEATON®), ensuring consistent quality and performance in laboratory use.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand | DURAN / WHEATON – DWK Life Sciences |
| Model / Catalog No. | W239298 |
| Product Type | Screw Cap for Sample Vials |
| Cap Thread Size | 20-400 |
| Material (Cap) | Black Phenolic (Thermoset Resin) |
| Material (Liner) | White Rubber (Styrene-Butadiene Rubber, SBR) |
| Color | Black Cap with White Rubber Liner |
| Closure Type | Screw-Type Closure |
| Autoclavable | Yes – up to 121 °C |
| Chemical Resistance | Excellent for aqueous and mild organic solutions |
| Sterilization Method | Steam Autoclave / Dry Heat |
| Country of Origin | Germany |
| Packaging | Typically 1,000 pcs per case (varies by supplier) |
Applications
Sealing and storing analytical, biological, or chemical samples
Reagent and solvent storage requiring reliable closure
Pharmaceutical, biotechnology, and quality-control laboratories
General laboratory applications requiring autoclavable and durable caps
Product Advantages
Provides leak-proof and airtight sealing for secure sample protection.
Resistant to heat, moisture, and solvents — ideal for sterilized or heated environments.
Reusable and autoclavable, maintaining consistent sealing integrity.
Compatible with all standard 20-400 thread sample vials.
Manufactured to DWK Life Sciences precision standards, ensuring long service life and reliability.
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