Description
NBR stopper, black, is a solid tapered laboratory stopper for secure closure of flasks, bottles and other laboratory glassware. It has a lower diameter of 31 mm, an upper diameter of 38 mm and a height of 35 mm, providing a stable conical fit in corresponding openings. Produced from NBR (nitrile butadiene rubber) in black, the stopper offers flexibility and mechanical strength for day-to-day laboratory handling. The design includes no pre-drilled holes (0 borings), ensuring a complete seal without channels for tubing. Available from manufacturer Deutsch & Neumann, the unit net weight is 0,0381 kg and the article is supplied as 1 piece. The rubber construction permits repeated use while maintaining a tight closure. This stopper is well suited to chemical, analytical and general laboratory applications that require a solid, hole-free black NBR stopper in these dimensions for dependable vessel sealing and sample protection.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc(s)
- Material: NBR rubber
- Colour: Black
- Lower diameter: 31 mm
- Upper diameter: 38 mm
- Height: 35 mm
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Questions about stopper NBR, black, bottom diameter: 31 mm top diameter: 38 mm height: 35 mm
What is this article?
stopper NBR, black, bottom diameter: 31 mm top diameter: 38 mm height: 35 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. 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.