Description
Screw cap GL 18 made of PBT for tubing feed-throughs with outer diameter 8 mm is a laboratory screw closure intended for hose and pipe passages on GL 18 threads. Fabricated from polybutylene terephthalate (PBT) and equipped with a PTFE inner part, it delivers a durable polymer body combined with a chemically resistant contact surface at the feed-through. The 8 mm outer-diameter geometry allows secure routing of matching tubing or pipe lines through the closure while maintaining a stable threaded connection. This screw cap from manufacturer Rettberg is aimed at laboratory users who require reliable GL 18 screw closures for apparatus setup, fluid transfer lines or general labware configuration. Supplied as a single piece with a net weight of 0,010 kg, it fits replacement and new-build applications alike. The PBT–PTFE construction supports routine laboratory practice where dependable screw caps for tubing and pipe feed-throughs are essential.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Thread: GL 18
- Material: Polybutylene terephthalate (PBT)
- Inner part: PTFE
- Tubing outer diameter: 8 mm
- Technical Information Sheet:
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Questions about Screw cap GL 18 from PBT, for tube leadthrough outer-Ø 8 mm
What is this article?
Screw cap GL 18 from PBT, for tube leadthrough outer-Ø 8 mm is the article on this page. Luminix Health distributes Rettberg 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.