Description
BOLA Replacement Inner Parts HT for GL 18 connections are spare sealing inserts sized for tubing with a 4,0 mm outer diameter. Each set is built around a PPS clamping ring plus a PTFE sealing wedge and sealing plate, so the process medium contacts only PTFE and benefits from the strong chemical resistance of that polymer. For screw fittings intended for hose outer diameters below 3 mm, an additional FKM O-ring is supplied; this ring stays outside the flow path and does not touch the medium. The GL 18 thread matches common laboratory glass and plastic fittings, making the parts practical for routine maintenance when original inserts wear or need renewal. Offered as a pack of two pieces from manufacturer Bohlender, the components support leak-tight tubing assemblies in chemically demanding laboratory work. Net weight is 0,005 kg. Clear dimensional matching to 4,0 mm hose outer diameter simplifies selection and replacement across standard HT-style screw connections used in fluid handling setups.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 2 pc(s)
- Product type: Replacement inner parts HT
- Thread: GL 18
- Hose outer diameter: 4,0 mm
- Clamping ring: PPS
- Seal components: PTFE (wedge and plate)
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Questions about BOLA HT Replacement Inner Parts, GL 18 Ø 4,0 mm inner parts made of PPS and PTFE
What is this article?
BOLA HT Replacement Inner Parts, GL 18 Ø 4,0 mm inner parts made of PPS and PTFE is the article on this page. Luminix Health distributes Bohlender for laboratory use. It sits in Hose connectors, adapters & fittings, inside Tubing, hoses & fittings, in Labware.
A hose connector or adapter joins two lines, or steps one bore down to another. The barb diameter has to match the tube, and the thread has to match the stopcock or the bottle. Most leaks are a mismatch here, not a hole in the tube.
Tubing is how a liquid or a gas moves between two vessels without being poured. Silicone stays flexible and survives repeated autoclaving. PTFE resists almost every solvent and is stiff. PVC is the ordinary flexible line for water and for mild aqueous work. The fitting, not the tube, is what usually leaks: the barb, the thread and the stopcock have to match the tube bore. Glass and plastic apparatus around these lines is indexed under ISO laboratory ware.
Which category should I open next?
The category is Tubing, hoses & fittings. The sub-category is Hose connectors, adapters & fittings. The catalogue is Labware.
Shelves beside this one are PVC, PTFE & other tubing, Stopcocks & valves, Silicone tubing and Tubing accessories.
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.

