Description
PTFE seal for cones and sockets NS 45/40 is a high-quality ground joint seal that prevents seizing and creates a dependable gas- and liquid-tight connection between standard ground glass components. Constructed from chemically inert PTFE, it withstands aggressive reagents and elevated temperatures typical of laboratory work. The convenient knurled grip allows effortless separation of glass ground-joint connections, reducing breakage risk and speeding up apparatus changes. Vacuum-tight sealing is obtained without grease, ensuring residue-free joints ideal for sensitive applications. Packaged as a single piece weighing 0,012 kg, this ground joint seal comes from manufacturer Rettberg and is manufactured in Germany. It is well suited to larger-scale distillation, reflux and vacuum systems that utilise NS 45/40 interfaces. The grease-free PTFE design supports clean workflows, while the robust form factor guarantees consistent sealing performance over many assembly cycles. Research and process laboratories gain a practical accessory that combines secure joint integrity with easy handling and long service life.
This article is part of Lids & seals, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: PTFE
- Joint size: NS 45/40
- Product type: Ground joint seal
- Registered trademark: Rettberg ®
- Technical Information Sheet:
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Questions about PTFE-seal for cones and sockets NS 45
What is this article?
PTFE-seal for cones and sockets NS 45 is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Lids & seals, inside Stoppers, caps & closures, in Labware.
Lids and seals are the covers of dishes, jars and tanks: a snap lid, a sealing film, a gasket. The seal is doing the work. A lid that only rests on the rim does not contain a volatile liquid.
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 Lids & seals. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Ground-joint glass stoppers 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.