Description
Cock plugs in SBW glass are laboratory glass spare parts designed for standard ground joints size 18.8 with a borehole diameter of 4 mm. They serve as the interchangeable plug element inside glass stopcocks, allowing precise control of liquid or gas flow in distillation, extraction, vacuum and general laboratory apparatus. The SBW glass construction delivers a stable ground sealing surface that seats securely in matching stopcock bodies. A 4 mm borehole provides a defined passage for media while remaining practical for cleaning and routine maintenance. Offered as 2 pc(s) per pack from manufacturer DWK Life Sciences, these plugs are ideal for replacing worn cores, completing new assemblies or keeping critical spares on hand. With a pack weight of approximately 0,001 kg, they are easy to store and handle. Compatible with glassware systems that use standard ground joint 18.8, they support reliable, leak-resistant operation across research, quality-control and educational laboratory environments where dependable stopcock performance is required.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 2 pc(s)
- Product type: Cock plugs
- Material: SBW glass
- Joint size: Standard ground joint 18.8
- Borehole diameter: 4 mm
- Weight: 0,001 kg
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Questions about Cock plugs, SBW glass, for st. gr. joint 18.8, borehole Ø 4 mm, 2 unit(s)
What is this article?
Cock plugs, SBW glass, for st. gr. joint 18.8, borehole Ø 4 mm, 2 unit(s) is the article on this page. Luminix Health distributes DWK Life Sciences 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?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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.