Description
N 20 aluminium crimp cap with centre hole is a silver open-top closure for chromatography vials. It is fitted with a blue transparent silicone septum and a centric colourless PTFE lamination, rated at 45° Shore A hardness with a septum thickness of 3 mm. The aluminium shell is designed for standard N 20 crimping and leaves a clear access path for autosampler or manual needles. Packaged in units of 100 pieces, the cap supports high-throughput GC and HPLC sample preparation where silicone/PTFE septa are preferred for sealing behaviour and chemical contact at the liner face. The blue transparent silicone body aids visual distinction on the bench, while the colourless PTFE layer faces the sample side of the vial. Mechanical strength of the silver aluminium crimp ring helps maintain even compression across the septum during sealing and storage. Offered by manufacturer Macherey-Nagel within the aluminium crimp-cap accessory line, this N 20 Bördelkappe is suited to analytical laboratories that standardise on open-hole aluminium closures with defined Shore hardness and fixed 3 mm septum geometry for reproducible vial integrity in routine chromatographic work.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Cap type: N 20 aluminium crimp cap, open hole
- Colour: Silver
- Septum: Silicone blue transparent with centric PTFE colourless
- Hardness: 45° Shore A
- Septum thickness: 3 mm
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Questions about CC N20-H,si, Sil bltr/ct. PTFE, 45°, 3.0
What is this article?
CC N20-H,si, Sil bltr/ct. PTFE, 45°, 3.0 is the article on this page. Luminix Health distributes Macherey-Nagel 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?
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.
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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.