DURAN WHEATON Screw Cap 240416
The DURAN WHEATON Screw Cap 240416 is a high-performance black phenolic cap with a PTFE-faced rubber liner, engineered for 20-400 threaded sample vials.
It provides a chemically inert, heat-resistant, and leak-proof seal, ideal for laboratories handling reactive or high-purity substances.
Manufactured by DWK Life Sciences (Germany), this autoclavable cap ensures exceptional sealing performance, chemical compatibility, and long-term reliability.
Key Features
Autoclavable Design – Resists repeated autoclave sterilization up to 121 °C without warping or seal degradation.
PTFE-Faced Rubber Liner – Virgin PTFE film (0.005 inch) laminated to 14B white SBR rubber, creating a non-reactive surface that prevents contamination and leaching.
Durable Phenolic Material – Black thermoset phenolic resin offers superior chemical, solvent, and heat resistance.
Standard 20-400 Thread – Universally compatible with laboratory sample vials using 20-400 thread finish.
Premium Laboratory Quality – Manufactured by DWK Life Sciences (WHEATON®), ensuring accuracy, durability, and consistent performance.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand | DURAN / WHEATON – DWK Life Sciences |
| Model / Catalog No. | 240416 |
| Product Type | Screw Cap for Sample Vials |
| Cap Thread Size | 20-400 |
| 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 (varies by supplier) |
Applications
Sealing of analytical, chemical, or biological samples in research labs
Ideal for high-purity reagents or volatile solvents requiring inert PTFE contact
Used in pharmaceutical, biotechnological, and QA/QC laboratories
Suitable for autoclaved and contamination-controlled environments
Product Advantages
Ensures inert, airtight, and leak-proof sealing for critical samples.
PTFE-faced liner protects against chemical reactions and sample absorption.
Resistant to solvents, acids, and sterilization cycles, ensuring long service life.
Compatible with all 20-400 threaded vials for universal laboratory use.
Backed by DWK Life Sciences precision standards for professional reliability.
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