Description
BOLA screw couplings GL 18 PTFE with PBTP screw caps are laboratory fittings for connecting two GL threads of the same size in a chemically resistant configuration. Each coupling combines PBTP screw caps rated up to +180 °C with a PTFE/FKM seal and a PTFE connecting piece, ensuring the medium contacts only PTFE along the flow path. This arrangement supports inert, clean connections between matching GL interfaces on glassware and laboratory apparatus. The GL 18 version has a sealing-lip-to-sealing-lip length of 17 mm, offering a compact profile for bench and system assembly. Net weight is 0,02 kg per unit, packed as a single piece. The core material for media contact is polytetrafluoroethylene (PTFE), while the PBTP caps provide mechanical strength and thermal capability for standard laboratory temperatures. These couplings from manufacturer Bohlender are made for reliable GL-to-GL joints where chemical inertness and defined sealing geometry are essential. Well suited to laboratory fluid handling, glassware interconnection and apparatus work that requires a GL 18 PTFE screw coupling with PBTP caps.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Thread size: GL 18
- Material: Polytetrafluoroethylene (PTFE)
- Screw caps: PBTP (up to +180 °C)
- Seal: PTFE/FKM
- Length sealing lip to sealing lip: 17 mm
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Questions about BOLA Threaded Couplings, GL 18 PTFE, PBTP nuts
What is this article?
BOLA Threaded Couplings, GL 18 PTFE, PBTP nuts 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.
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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.