Round-Bottom Screw-Cap Test Tube Borosilicate Glass 15-415 Thread
Round-bottom test tube in borosilicate glass with 15-415 standard thread. Available in two closure options: black phenolic cap with silicone liner (A) or natural polypropylene cap with PTFE-lined silicone liner (B). Version B is the choice when working with aggressive solvents — PTFE holds where silicone alone falls short. Both versions are autoclavable. The 15-415 thread is compatible with most standard screw caps and accessories on the market.
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SKU:
28259-1
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|---|---|---|---|---|
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Round-Bottom Screw-Cap Test Tube Borosilicate Glass 15-415 Thread
Round-bottom test tube in borosilicate glass with 15-415 thread. Two cap options to match sample type and reagents used in each application.
Cap Options
- Version A: Black phenolic cap with silicone liner — standard leak-tight closure for most aqueous applications and buffers
- Version B: Natural polypropylene cap with PTFE-lined silicone liner — for organic solvents and aggressive reagents where silicone alone offers no reliable seal
Technical Specifications
- Material: Borosilicate glass
- Bottom: Round
- Thread: 15-415
- Cap A: Black phenolic + silicone liner
- Cap B: Natural polypropylene + silicone/PTFE liner
- Autoclave: Yes, both versions
When to Use Each Version
Version A covers general laboratory use: aqueous samples, buffers, culture media. Version B is indicated when the protocol involves organic solvents or reagents that degrade silicone — the PTFE coating acts as a chemical barrier between the reagent and the liner.
Compatibility
Standardised 15-415 thread. Compatible with caps, septa and 15-415 accessories from other manufacturers. Autoclavable in both configurations — useful when the tube needs to be sterilised already closed prior to inoculation.
| Brand | LBG |
|---|
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