Description
Lid DN 300 with central socket NS 24/29 and four GL 25 threads is a multi-port reaction vessel cover manufactured from borosilicate glass 3.3. The 300 mm diameter matches standard DN 300 flat-flange reaction vessels used in laboratory and pilot-scale synthesis. A single NS 24/29 ground-joint socket is positioned in the centre for secure mounting of stirrers, temperature probes or condensers, while four peripheral GL 25 threads provide flexible ports for gas inlets, sensors, sampling lines or additional fittings. This configuration supports complex multi-neck setups requiring simultaneous reagent addition, monitoring and reflux. The borosilicate glass 3.3 construction delivers the chemical resistance and thermal-shock stability expected in organic synthesis, pharmaceutical process development and materials research. Net weight is 2,890 kg. Produced by manufacturer Rettberg, the lid integrates cleanly with corresponding flat-flange vessels and standard laboratory glassware accessories, ensuring reliable sealing when used with appropriate gaskets and clamps. Ideal for research and production environments that demand durable, transparent multi-port vessel closures.
This article is part of Lids & seals, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc(s)
- Diameter: 300 mm
- Joint size: NS 24/29
- Material: Borosilicate glass 3.3
- Connections: 1× NS 24/29 socket (centre), 4× GL 25 thread
- Product type: Reaction vessel lid
- Technical Information Sheet:
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Questions about Lid, DN 300, socket size 24/29, 4x thread GL 25
What is this article?
Lid, DN 300, socket size 24/29, 4x thread GL 25 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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.