Description
Flat-bottom flask with standard ground joint, without stopper, Boro 3.3, white inscription, DIN EN is a standing laboratory flask intended for heating, dissolution and general liquid handling. This 250 ml model is fitted with a socket joint NS 24/29, enabling reliable connection to compatible condensers, adapters and other ground-joint apparatus. Produced to DIN EN ISO 4797 from borosilicate glass 3.3, the flask delivers the interchangeability and resistance to thermal shock and common laboratory chemicals expected in research, teaching and analytical environments. White inscription on the body aids quick visual identification during multi-step procedures. Delivered without a stopper, it remains open for flexible use with matching stoppers or fittings. The flat bottom ensures stable standing on hotplates and benches during preparative work or temporary storage. Offered by manufacturer Hecht as a convenient multipack, this Normschliff standing flask is well suited to distillation trains, reaction setups and everyday glassware inventories that call for a 250 ml flat-bottom vessel with NS 24/29.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Product type: Flat-bottom flask with standard ground joint
- Material: Boro 3.3
- Volume: 250 ml
- Ground joint: NS 24/29
- Stopper: without stopper
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Questions about Flasks, boiling, flat bottom with socket, Boro 3.3, DIN EN ISO 4797, printing
What is this article?
Flasks, boiling, flat bottom with socket, Boro 3.3, DIN EN ISO 4797, printing is the article on this page. Luminix Health distributes Hecht for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labware.
A round-bottom flask is the heating flask of a distillation or a reflux. The curved wall takes the heat, and the ground neck connects to a still head or a condenser. The joint size, not only the volume, has to match the rest of the set.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Beakers & flasks. The sub-category is Round-bottom flasks. The catalogue is Labware.
Shelves beside this one are Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
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.

