Description
BOLA sealing stoppers NS 10/19 PTFE with knurled handle are laboratory stoppers made from polytetrafluoroethylene for closing standard ground joints. Each stopper has a standard taper and sealing rings on the outer surface, with a knurled grip that aids handling. Compared with glass stoppers they are easier to remove and do not require greasing. Dimensions correspond to size NS 10/19. Note that expansion of the stoppers on heating can, in rare cases, lead to breakage of the ground joints. Supplied as a pack of 3 pieces with a net weight of 0,007 kg, these PTFE stoppers suit routine sealing of flasks, adapters, and apparatus where chemical resistance and grease-free operation are preferred. Products from manufacturer Bohlender offer a practical alternative to glass closures for everyday laboratory work on small NS joints, combining accessible outer sealing rings with a knurled handle for controlled insertion and withdrawal during setup and dismantling.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 3 pc(s)
- Material: Polytetrafluoroethylene (PTFE)
- Size: NS 10/19
- Handle: Knurled grip
- Design: Standard taper with external sealing rings
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Questions about BOLA Stoppers, NS 10/19 PTFE, knurled grip
What is this article?
BOLA Stoppers, NS 10/19 PTFE, knurled 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. 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.