Description
BOLA replacement special seals, Ø 8 mm PTFE/FKM are interchangeable sealing inserts for PTFE guide sleeves used in laboratory stirring closures. Each unit is a combination of a PTFE seal with an FKM O-ring, designed for straightforward exchange in the corresponding guide sleeve. The special seal provides sealing against the stirring shaft and is dimensioned for a shaft diameter of 8 mm with a cap thread GL 25. Net weight is 0,002 kg per seal. When shaft sealing performance declines through wear or residue build-up, these inserts can be replaced without discarding the entire guide sleeve assembly. PTFE and FKM materials align with common fluoropolymer requirements for chemical contact parts in laboratory stirring systems. Packed as 5 pieces from manufacturer Bohlender, the set supports routine maintenance of BOLA PTFE guide sleeves of the matching shaft size. Clear specification of shaft Ø 8 mm and GL 25 cap thread helps users select the correct spare for installed stirring closures and keep sealing interfaces in reliable working order.
This article is part of Lids & seals, in Stoppers, caps & closures.
Key features
- Pack size: 5 pc(s)
- Product type: Replacement special seal (PTFE/FKM)
- Material: Polytetrafluoroethylene (PTFE) with FKM O-ring
- Shaft diameter: 8 mm
- Cap thread: GL 25
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Questions about BOLA Special Gaskets, Ø 8 mm PTFE/FKM
What is this article?
BOLA Special Gaskets, Ø 8 mm PTFE/FKM is the article on this page. Luminix Health distributes Bohlender for laboratory use. It sits in Lids & seals, inside Stoppers, caps & closures, in Labware.
Lids and seals are the covers of dishes, jars and tanks: a snap lid, a sealing film, a gasket. The seal is doing the work. A lid that only rests on the rim does not contain a volatile liquid.
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 Lids & seals. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Ground-joint glass stoppers 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.

