Description
NR rubber stopper, grey, is a tapered laboratory closure measuring 31 mm at the lower diameter, 38 mm at the upper diameter and 35 mm in height. Fabricated from grey rubber, it features two pre-drilled bores of 7 mm diameter for simultaneous routing of tubing, glassware accessories or sensor probes while retaining an effective seal on larger flask and bottle necks. The increased height and bore size relative to smaller NR variants accommodate thicker-walled necks and slightly larger tubing commonly used in preparative and process-oriented laboratory setups. Net weight is 0,03942 kg per piece. This stopper from manufacturer Deutsch & Neumann forms part of the standardised NR grey series employed wherever durable, bored rubber stoppers with defined dimensions are specified. Packaged as one piece, it supports individual replacement or assembly of graduated stopper sets for multi-vessel experiments, sample handling and general wet-chemistry applications that demand a secure, reusable rubber seal.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Rubber
- Colour: Grey
- Lower diameter: 31 mm
- Upper diameter: 38 mm
- Height: 35 mm
- Technical Information Sheet:
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Questions about stopper NR, grey, bottom diameter: 31 mm top diameter: 38 mm height: 35 mm
What is this article?
stopper NR, grey, 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.