Description
Septum N20 butyl light grey/PTFE dark grey is a laminated sealing disc for N 20 crimp-neck headspace vials. Specified at 50° Shore A hardness and 3,0 mm thickness, the septum combines a resilient butyl rubber body with a dark grey PTFE contact layer facing the sample. This construction supports needle penetration and resealing during automated headspace sampling while limiting analyte interaction at the PTFE surface. Each pack holds 100 pieces, matching common laboratory consumption patterns for routine GC headspace work. Compatible with standard N 20 aluminium and magnetic crimp caps, the disc seats cleanly on DIN-style roll rims. Manufactured by Macherey-Nagel, these septa are intended for laboratories analysing volatiles, residual solvents and similar matrices that demand consistent barrier properties under heat and pressure. The defined 3,0 mm thickness and 50° Shore A rating help standardise sealing behaviour across instrument trays and heating blocks. Selecting the light-grey butyl / dark-grey PTFE combination simplifies inventory control when multiple septum chemistries are stocked side by side.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 100 pc(s)
- Size: N 20
- Septum material: Butyl light grey/PTFE dark grey
- Hardness: 50° Shore A
- Septum thickness: 3,0 mm
- EAN: 4046681089237
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Questions about Septa N20 But lgr/PTFE dgr, 50°, 3.0
What is this article?
Septa N20 But lgr/PTFE dgr, 50°, 3.0 is the article on this page. Luminix Health distributes Macherey-Nagel for laboratory use. It sits in Vial caps & septa, inside Vials, caps & septa, in Chromatography equipment.
A vial cap and a septum have to match the vial neck: crimp, screw or snap, and the diameter. The septum material, PTFE/silicone or rubber, decides chemical resistance and how many times a needle can pierce it. A septum that sheds into the solvent becomes ghost peaks.
An autosampler vial is the small closed bottle a chromatograph picks up. The neck is crimp, screw or snap, and the cap and the septum have to be that neck. The septum is the part the needle pierces. A soft septum reseals. A septum that is wrong for the solvent swells or sheds particles into the sample. Inserts reduce the volume when the sample is scarce. The separation they feed is described with IUPAC names and PubChem data.
Which category should I open next?
The category is Vials, caps & septa. The sub-category is Vial caps & septa. The catalogue is Chromatography equipment.
Shelves beside this one are Chromatography accessories, Autosampler vials, Crimpers & decappers and Vial inserts.
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. Delivery across Europe, two to five days when in stock. 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.
