Description
Octagonal lid stopper NS 45/40 is a hollow ground-joint stopper for standard laboratory glassware connections. Produced from SBW glass in accordance with DIN 12252, this octagonal cap stopper provides a secure closure for apparatus fitted with an NS 45/40 joint. The hollow body keeps the mass low while retaining the mechanical stability required for routine laboratory handling. Net weight is 0,121 kg per piece, making the stopper practical for flasks, adapters and other vessels that need a reliable temporary or longer-term seal. The distinctive octagonal lid profile improves grip and positioning during assembly and disassembly. Supplied as a single unit, the stopper integrates readily into existing glassware sets used in synthesis, distillation and general analytical work. This component from manufacturer Witeg belongs to the established range of norm ground-joint stoppers employed across chemical and life-science laboratories. The glass construction offers the chemical durability expected of laboratory glassware and withstands standard cleaning procedures. It is well suited wherever a precise NS 45/40 ground-joint seal is required without additional accessories or fittings.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Octagonal lid stopper
- Joint size: NS 45/40
- Design: Hollow
- Material: SBW glass
- Standard: DIN 12252
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Questions about ST-stopper, octagonal plate,ST45/40
What is this article?
ST-stopper, octagonal plate,ST45/40 is the article on this page. Luminix Health distributes Witeg 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.