Description
neochrom® screw caps ND8 closed, butyl red/PTFE grey, are black polypropylene closures with an 8-425 thread, supplied closed and fitted with a red butyl / grey PTFE septum. The septum thickness is 1,3 mm, giving a reliable seal for autosampler vials used in gas chromatography and high-performance liquid chromatography. Temperature resistance from −40 °C to +120 °C supports common GC and HPLC sample-handling ranges, while the resealing behaviour of the butyl/PTFE combination makes the caps suitable for multiple injections. Packed as 100 pieces per pack, these ND8 screw caps from manufacturer neolab - Labor serve as a standard closure option for routine chromatographic workflows. The closed PP shell protects the septum during storage and handling, and the PTFE face provides the inert contact surface toward the sample. Laboratories running GC or HPLC sequences can use this configuration wherever a closed ND8 screw cap with butyl/PTFE septum is specified for vial sealing and repeated needle penetration.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Thread: 8-425
- Cap material: Polypropylene (PP), black
- Septum: Butyl red/PTFE grey
- Septum thickness: 1,3 mm
- EAN: 4058072037383
- Technical Information Sheet:
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Questions about neochrom® Schraubkappen ND8 geschlossen, Butyl rot/PTFE grau, 100 St./Pack
What is this article?
neochrom® Schraubkappen ND8 geschlossen, Butyl rot/PTFE grau, 100 St./Pack is the article on this page. Luminix Health distributes neolab 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.