Description
BOLA Grip Collar Sleeves NS 55/44 are reusable PTFE sleeves for sealing standard laboratory ground joints. Fabricated from polytetrafluoroethylene (PTFE), they incorporate a protruding grip collar and external sealing rings that achieve high-vacuum-tight closure with a leak rate below 0,0001 mbar × l/s. Robust construction supports long-term continuous use, while the accessible sealing rings simplify cleaning between runs. The sleeve conforms to European standard size NS 55/44 for compatibility with matching conical joints in synthesis, distillation, and analytical glassware. Supplied as one piece with a net weight of 0,0144 kg, it offers a durable, grease-free sealing solution where chemical inertness and low leakage matter. These BOLA sleeves from manufacturer Bohlender unite PTFE resistance with a practical grip-collar format for repeated make-and-break connections. They suit vacuum work, multi-neck flask assemblies, and other apparatus requiring reliable joint seals without lubricant contamination.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Material: Polytetrafluoroethylene (PTFE)
- Joint size: NS 55/44
- Design: Protruding grip collar with external sealing rings
- Leak rate: < 0,0001 mbar × l/s
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Questions about BOLA Sleeves with Gripping Ring, NS 55/44 PTFE, reusable
What is this article?
BOLA Sleeves with Gripping Ring, NS 55/44 PTFE, reusable 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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.