Description
BOLA rigid screw couplings for GL 18 provide a stable threaded connection built around GL internal threads in blue PPS and an internal connecting tube of PTFE. The specialised design lets the two halves rotate freely relative to each other so attached components can be aligned without stressing the joint, while the construction itself delivers high mechanical stability. A sealing lip on the connecting tube, backed by an FKM O-ring, ensures reliable sealing on the GL thread. Only PTFE contacts the flow medium, giving broad chemical resistance for laboratory fluid handling. Dimensions are matched to GL 18 threads, with 24 mm from sealing lip to sealing lip and an overall length of 49 mm. Supplied as a single piece with a net weight of 0,015 kg, this coupling from manufacturer Bohlender suits secure, chemically inert links between GL glassware and apparatus in analytical and preparative setups where alignment flexibility and leak-tight performance matter.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Thread size: GL 18
- Connecting tube: PTFE
- Screw caps: PPS blue with GL internal threads
- Seal: sealing lip with FKM O-ring
- Length lip to lip: 24 mm
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Questions about BOLA Rigid Threaded Couplings, GL 18 Connecting tube made of PTFE, screw caps ma
What is this article?
BOLA Rigid Threaded Couplings, GL 18 Connecting tube made of PTFE, screw caps ma is the article on this page. Luminix Health distributes Bohlender 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. Delivery across Europe, two to five days when in stock. 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.
