Description
NBR stopper, black, featuring a lower diameter of 21 mm, upper diameter of 27 mm and height of 30 mm provides dependable sealing for laboratory flasks and apparatus. A single bore of 5 mm diameter runs through the centre, allowing convenient passage of tubing, thermometers or other accessories without compromising the seal. Produced from NBR (nitrile butadiene rubber) in black, the stopper offers a balanced combination of elasticity and durability suited to everyday laboratory work. Its tapered geometry ensures a firm fit across corresponding neck sizes, while the 30 mm height supplies adequate engagement depth. Net weight is 0,01524 kg per piece, keeping the stopper easy to handle yet stable in use. Available in packs of 100 pieces from manufacturer Deutsch & Neumann, these stoppers facilitate straightforward stock replenishment in research, analytical and educational settings. They are intended for general laboratory applications requiring accurate dimensions and NBR material compatibility for reliable, leak-resistant closures.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Material: NBR rubber
- Colour: Black
- Lower diameter: 21 mm
- Upper diameter: 27 mm
- Height: 30 mm
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Questions about stopper NBR, black, bottom diameter: 21 mm top diameter: 27 mm height: 30 mm
What is this article?
stopper NBR, black, bottom diameter: 21 mm top diameter: 27 mm height: 30 mm is the article on this page. Luminix Health distributes Deutsch & Neumann 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. Delivery across Europe, two to five days when in stock. 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.
