Description
SKB N18-kL is a bonded N 18 polypropylene screw cap with 18-400 thread, finished white and configured as a closed cap for secure laboratory vial sealing. The septum combines white silicone with a blue PTFE layer, rated at 55° Shore A hardness and 1,3 mm thickness to deliver stable compression and a chemically resistant contact surface. It is suited to chromatography, sample storage, and general analytical work that requires a reliable silicone/PTFE liner on larger N 18 necks. Each unit is packed in quantities of 100 pieces for convenient laboratory inventory. Bonded construction keeps the septum aligned under handling and repeated opening cycles. Available from manufacturer Macherey-Nagel, the SKB N18-kL format addresses standard 18-400 screw threads used across many vial systems. The closed white design shields the septum until puncture and supports clear bench identification. Choose this closure when defined Shore hardness, septum thickness, and PTFE-faced silicone performance are needed for routine screw-cap applications.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Thread: N 18-400 (bonded PP)
- Cap colour: white, closed
- Septum material: silicone white/PTFE blue
- Hardness: 55° Shore A
- EAN: 4046681088650
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Questions about SCB N18-nH, w, Sil w/PTFE bl, 55°, 1.3
What is this article?
SCB N18-nH, w, Sil w/PTFE bl, 55°, 1.3 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.
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.