Description
2-Way stopcock NS 18,8 with hollow NS glass plug is a precision glass valve for controlling liquid or gas flow in laboratory apparatus. It features a hollow NS glass plug, bent tube connection and a 2,5 mm bore, manufactured to DIN 12553 for reliable sealing on standard ground joints. The NS 18,8 taper provides a secure fit for vacuum and atmospheric work in distillation, filtration and general fluid-handling setups. With a net weight of 0,07 kg and supplied as a single piece, this compact stopcock integrates easily into existing glassware trains. Produced by Witeg, the component offers the chemical resistance and dimensional accuracy expected of laboratory glass valves. Suitable for routine analytical and preparative chemistry where a durable two-way shut-off is required, it supports clean, leak-tight operation without additional adapters. Ideal for research, teaching and quality-control laboratories that standardise on DIN-compliant ground-joint systems.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Type: 2-way stopcock
- Joint size: NS 18,8
- Bore: 2,5 mm
- Plug: Hollow NS glass plug
- Connection: Bent tube
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about Stopcock, double bore, with hollow plug
What is this article?
Stopcock, double bore, with hollow plug is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Rubber & silicone stoppers, inside Stoppers, caps & closures, in Labware.
A rubber or silicone stopper is pushed into a mouth. The size number corresponds to a top and bottom diameter. Silicone survives higher temperatures and more autoclave cycles. Natural rubber is attacked by oils and by some solvents.
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 Rubber & silicone stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Ground-joint glass 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.