Description
BOLA grooved sleeves NS 12/21 PTFE are polytetrafluoroethylene ground-joint sleeves for secure sealing of European standard conical joints in laboratory glassware. External sealing rings deliver dependable contact, while the collar-free profile leaves ground-joint clamps unobstructed. Rated for vacuum service to 0,1 mbar, the robust construction is intended for continuous laboratory use. Sealing rings stay easy to reach, simplifying cleaning after use. Size NS 12/21 matches corresponding conical joints in distillation trains, reaction apparatus and multi-joint assemblies. Pack size is 10 pc(s); net weight is 0,0002 kg. Manufactured in PTFE by Bohlender, these sleeves offer chemical resistance and a clamp-compatible form factor for organic synthesis, vacuum work and general analytical setups. They provide durable, low-maintenance sealing where PTFE inertness and unrestricted clamp placement are essential for reliable joint integrity.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 10 pc(s)
- Material: Polytetrafluoroethylene (PTFE)
- Joint size: NS 12/21
- Vacuum rating: up to 0,1 mbar
- Design: External sealing rings, no protruding grip collar
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Questions about BOLA Sleeves with Ribs, NS 12/21 PTFE
What is this article?
BOLA Sleeves with Ribs, NS 12/21 PTFE is the article on this page. Luminix Health distributes Bohlender for laboratory use. It sits in Grease, boiling stones & sealants, inside Tools & accessories, in Labware.
Grease seals a ground joint. Boiling stones give a liquid a place to start boiling so it does not bump. A sealant does the same job as grease when grease would contaminate the product. They are small, and they decide whether a joint weeps.
The small tools of the bench are what the hand actually holds: a spatula for a powder, forceps for an object that must stay clean, a brush for a narrow neck, a desiccator when a dried sample must not take up water again. None of these reads a measurement. They keep the measurement possible. The apparatus around them is listed under ISO laboratory apparatus.
Which category should I open next?
The category is Tools & accessories. The sub-category is Grease, boiling stones & sealants. The catalogue is Labware.
Shelves beside this one are Spatulas & spoons, Other lab tools & accessories, Lab furniture, trolleys & storage, Tweezers & forceps, Scissors, scalpels & dissecting instruments, Weighing boats, dishes & paper, Desiccators & desiccant, Timers, stopwatches & calculators, Stationery, books & lab notebooks, Brushes & cleaning tools, Stirring rods, spreaders & glass tools, Cutting & sealing tools and Gas handling & burners accessories.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
