Description
BOLA screw connection caps EX are black laboratory screw caps for GL 18 threads, each provided with a central bore of 11,0 mm diameter. Fabricated from conductive PPS-EX, they offer a dissipative polymer solution for screw closures where electrostatic control is required alongside chemical resistance in laboratory fluid handling. A grippy knurled outer surface aids secure manual fastening onto matching GL threads, while the bore accommodates tubing, sensors or other inserts through the cap. The EX-oriented conductive construction distinguishes these closures from standard insulating plastic caps and supports use on bottles, vessels and transfer assemblies that call for electrically conductive connection hardware. Available from manufacturer Bohlender in packs of five pieces, with a net weight of 0,0054 kg in the product data, they serve as practical replacements or stock items for GL 18 ports. Specified dimensions—thread GL 18 and bore diameter 11,0 mm—allow clear matching to existing GL glassware and fittings. Ideal for laboratory material applications needing reliable black conductive screw connection caps with a defined through-opening.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 5 pc(s)
- Thread: GL 18
- Bore diameter: 11,0 mm
- Colour: black
- Material: conductive PPS-EX
- Design: knurled screw cap with bore
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Questions about BOLA Screw Caps with Aperture EX, GL 18, Ø 11,0 mm black, made of conductive PPS
What is this article?
BOLA Screw Caps with Aperture EX, GL 18, Ø 11,0 mm black, made of conductive PPS 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.

