Description
neochrom® screw caps ND18 with a 12 mm hole are open-centre polypropylene closures for ND18 short-thread vials in analytical chemistry and sample-handling workflows. Each cap carries a butyl red/PTFE grey septum that pairs an elastomeric seal with a chemically resistant PTFE layer on the sample side. The 12 mm aperture gives clear needle access for manual injection or autosampler use, while the short-thread PP housing secures the cap on matching ND18 vials. Packaged as 100 pieces per pack, these neochrom® screw caps from manufacturer neolab - Labor suit high-throughput preparation benches and chromatographic laboratories that standardise on ND18 formats. The butyl/PTFE septum combination is selected where solvent compatibility and dependable sealing after puncture are required. Open-hole geometry supports protocols that need straightforward repeated access once the septum is in place. These consumable closures integrate into routine GC and HPLC sealing sequences, offering consistent fit, handling and septum performance for everyday vial-based sample work.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Cap type: Screw caps ND18 with 12 mm hole
- Housing material: PP, short thread
- Aperture: 12 mm
- Septum: Butyl red/PTFE grey
- EAN: 4058072090739
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Questions about neochrom® screw caps ND18 12 mm Loch, Septum Butyl red/ PTFE grau, VE 100 pieces
What is this article?
neochrom® screw caps ND18 12 mm Loch, Septum Butyl red/ PTFE grau, VE 100 pieces is the article on this page. Luminix Health distributes neolab for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Labware.
A screw cap has a thread and a liner. The thread has to match the bottle. The liner has to survive the liquid: a pulp liner fails in a solvent that a PTFE-faced liner ignores. The colour of the cap is not the specification.
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 Screw caps & closures. The catalogue is Labware.
Shelves beside this one are Rubber & silicone stoppers, Ground-joint glass stoppers, Lids & seals and Closures (other).
What should I check before I order?
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