Description
BOLA cap seals for GL 14 threads are composite sealing discs with a diameter of 13,0 mm and an approximate thickness of 3,3 mm. The upper face is made of polytetrafluoroethylene (PTFE) while the underside is a silicone elastomer that compensates for unevenness on the sealing surface. In use, the process medium contacts only the PTFE side, combining chemical resistance with reliable mechanical sealing. These seals from manufacturer Bohlender are intended for laboratory screw-cap connections where a clean PTFE barrier and compliant backing are required. They are supplied in packs of 50 pieces, with a net weight of 0,0004 kg per unit data. Suitable for GL 14 fittings on bottles, flasks and related labware, the PTFE/silicone construction supports dependable closure performance in everyday chemical and analytical workflows without introducing unnecessary complexity into the sealing interface.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 50 pc(s)
- Product type: Cap seals
- Thread size: GL 14
- Seal diameter: 13,0 mm
- Seal thickness: approx. 3,3 mm
- Material: PTFE/silicone
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Questions about BOLA Gaskets for caps, GL 14, Ø 13,0 x 3,3 mm PTFE/silicone
What is this article?
BOLA Gaskets for caps, GL 14, Ø 13,0 x 3,3 mm PTFE/silicone 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. 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.

