Description
Screw cap ND8 in polypropylene (PP), without septum, black, with a 5,5 mm centre hole and 8-425 thread, is a laboratory closure for ND8 screw-neck vials used in analytical and autosampler workflows. The open-hole design allows needle access once a suitable septum is fitted; this cap is supplied without a septum, so it is not inherently leak-tight until a matching septum is installed. Septa should therefore be ordered separately according to the analytical method and solvent system. The black PP body and 8-425 thread suit common short-thread ND8 vial formats found in HPLC and related sample handling. From manufacturer Altmann Analytik, the cap is positioned as a practical alternative to equivalent open-top screw caps from several major chromatography suppliers and is noted for use in 3-in-1 and 2-in-1 kit contexts for selected VWR (Merck)/Hitachi autosampler setups. Packed in 1000 pieces, it supports high-throughput laboratories that standardise on ND8 PP screw closures with a 5,5 mm aperture and prefer to select septa independently for each application.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1000 pc(s)
- Product type: ND8 screw cap without septum
- Material: Polypropylene (PP)
- Colour: Black
- Centre hole: 5,5 mm
- Thread: 8-425
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Questions about ND8 PP Screw Cap, without Septa, black, 5,5mm centre hole, 10x100/PAK
What is this article?
ND8 PP Screw Cap, without Septa, black, 5,5mm centre hole, 10x100/PAK is the article on this page. Luminix Health distributes Altmann Analytik 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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.