24-400 screw caps for silicone septa are laboratory closures for sealing sample containers like glass vials, jars, or bottles. They have a 24-400 thread size, indicating a cap diameter of 24 mm and a thread pitch of 400.
The screw cap is threaded and fits securely onto containers with a 24-400 neck finish. A silicone disc is integrated into the cap. It functions as a seal and a penetrable surface for sampling or injecting liquids using a syringe.
Commonly used with autosampler vials for GC (Gas Chromatography) or HPLC (High-Performance Liquid Chromatography).
Protects volatile or sensitive samples during storage and transport.
Allows for injection of reagents or sample extraction without opening the vial, preserving sterility and integrity.
Used for storing drug formulations, biologics, or chemical standards.
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