Description
2-Way stopcock according to Schiff with hollow plug NS 29,2 is a precision glass laboratory valve for controlled flow in chemical and analytical apparatus. It combines a hollow NS glass plug with a 10 mm bore and overall dimensions of 18 × 120 mm, and is manufactured to DIN 12545. The standardised ground joint NS 29,2 provides a reliable seal and interchangeability with matching conical glassware. Supplied as a single piece with a net weight of 0,207 kg, the stopcock is suited to two-way routing in vacuum, pressure and general process lines. The hollow-plug design keeps mass low while preserving mechanical stability and smooth rotation under routine laboratory use. From manufacturer Witeg, this Schiff-type stopcock integrates readily into synthesis, distillation and teaching setups that rely on NS joints. Its robust glass construction supports reproducible connections and straightforward maintenance in research, quality-control and educational environments where standardised conical stopcocks are required.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Type: 2-way stopcock according to Schiff
- Joint size: NS 29,2
- Plug: Hollow NS glass plug
- Bore: 10 mm
- Dimensions: 18 × 120 mm
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Questions about Stopcock double bore hollow plug ST 29,2
What is this article?
Stopcock double bore hollow plug ST 29,2 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.