The thread size of this item is 20-400. Unfortunately, a 28 threaded hole cap is currently not available. A 24-400 thread open cap option is currently the largest option available. See the link below to review:
https://www.sigmaaldrich.com/US/en/product/supelco/27057
64715
Screw Top Mini Flask with Hole Cap and Septum
volume 10 mL, pkg of 12 ea
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12 EA
¥36,300
About This Item
UNSPSC Code:
12000000
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Features and Benefits
Heat resistant borosilicate glass flasks provide an inert seal when used with a hole cap and PTFE silicone septum (included) or a Mininert valve. Excellent for liquid-liquid extraction of trihalomethanes from drinking water. Also useful for sample collection, solution preparations, derivatization reactions, extractions, and many other applications.
Other Notes
Replacement cap for the Mini Flask is part number 27176, the replacement septa is part number 27177.
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What is the thread of these caps? Is it 28mm? Do you have any caps with septum for 28mm THREAD?
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Is this septum suitable for injection? Can I use this flask for microbial culturing to prevent gas exchange.
1 answer-
The septum used with this product is sold under Catalog No. 27177. This type of septum is suitable for sampling with a needle, but septa typically are replaced after puncturing in highly sensitive analytical applications to ensure reproducibility.
The cap and septum in this product form a gas-tight seal, making it suitable for preventing environmental gas exchange in microbial culture experiments.Helpful?
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