Description
Plastic stopper in polyethylene (PE) conforming to DIN 12254 closes laboratory glassware fitted with a standard ground joint NS 34/35. Its octagonal head improves finger grip when seating or withdrawing the stopper from the taper, while the PE construction delivers a lightweight, durable seal for routine vessel closure. The single-unit format is ideal when only one NS 34/35 stopper is required for a specific flask, bottle or reaction vessel in the laboratory inventory. From manufacturer Lenz, the part follows DIN 12254 geometry so it mates cleanly with matching 34/35 ground joints across common lab glassware ranges. Polyethylene is suitable for many general laboratory media and is simple to rinse and reuse in day-to-day workflows. At about 0,014 kg the stopper remains easy to handle during repeated open–close cycles on the bench. It belongs to the stoppers-with-standard-taper family of labware consumables and supports teaching, analytical and preparative setups that standardise on the 34/35 joint size. Use it wherever a PE alternative to glass stoppers is preferred for safety, weight or cost reasons without leaving the DIN 12254 dimensional system.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: PE (polyethylene)
- Standard: DIN 12254
- Ground joint: NS 34/35
- Head shape: Octagonal
- Weight: 0,014 kg
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Questions about Plastic stopper, PE, DIN 12254, standard ground joint 34/35 octagonal, 1 unit(s)
What is this article?
Plastic stopper, PE, DIN 12254, standard ground joint 34/35 octagonal, 1 unit(s) is the article on this page. Luminix Health distributes Lenz for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
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 Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone 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.