Description
N 9 PP screw cap SK N9-L in black is an open-top laboratory closure fitted with a slit silicone white/PTFE blue septum for secure sealing of short-thread vials. The septum has a thickness of 1,0 mm and a hardness of 55° Shore A; the pre-cut slit eases needle entry and helps reduce coring during repeated injections. Each pack contains 100 pieces, supporting high-throughput sample preparation in analytical environments. The polypropylene shell delivers mechanical strength for repeated handling, while the dual-layer septum orients PTFE toward the sample to limit analyte interaction and silicone toward the exterior for elasticity. Black colour coding enables fast visual sorting on crowded benches and autosampler trays. This screw cap from manufacturer Macherey-Nagel matches standard N 9 thread geometry used with many HPLC and GC vials. Laboratories rely on defined septum hardness, slit geometry and thickness to maintain consistent sealing performance across analytical runs. The open-top design permits direct septum access without removing the cap, streamlining injection workflows in chromatography and general sample storage applications.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Thread: N 9
- Cap colour: black
- Septum: silicone white/PTFE blue, slit
- Hardness: 55° Shore A
- EAN: 4046681089435
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Questions about SC N9-H, blk, Sil w/PTFE bl, (-) 55°,1.0
What is this article?
SC N9-H, blk, Sil w/PTFE bl, (-) 55°,1.0 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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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.