Description
BOLA sealing stopper NS 45/40 is a PTFE laboratory closure featuring a standard ground joint with external sealing rings and a hexagonal handle for firm, controlled seating. Fabricated from polytetrafluoroethylene, it delivers wide chemical resistance and does not require greasing, simplifying setup compared with traditional glass stoppers. Dismantling is generally easier than with glass counterparts, which is advantageous for repeated connection and disconnection of larger ground-joint glassware in preparative and process laboratory environments. The hexagonal handle has a wrench size of 52 mm. Net weight is 0,19 kg, offered as one piece. This stopper from manufacturer Bohlender matches NS 45/40 joints; thermal expansion of PTFE under strong heating may occasionally risk joint breakage, so temperature management is advisable. Ideal where a robust, grease-free PTFE sealing stopper with hexagonal grip is needed for larger standard joints.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Brand: BOLA
- Material: Polytetrafluoroethylene (PTFE)
- Joint size: NS 45/40
- Handle: Hexagonal, SW 52 mm
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Questions about BOLA Stoppers, NS 45/40 PTFE, hexagonal grip
What is this article?
BOLA Stoppers, NS 45/40 PTFE, hexagonal grip is the article on this page. Luminix Health distributes Bohlender for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Lids & seals and Closures (other).
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. Articles in stock ship within 2–5 business days. 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.