Description
Ground joint sleeve NS 7/16 is a thin PTFE sleeve sized for standard NS 7/16 conical ground glass joints used in laboratory apparatus. With a wall thickness of 0,05 mm, it forms a conformal PTFE interface between the male cone and female socket. The sleeve is supplied as a single piece and has a net weight of 0,001 kg, making it a lightweight accessory for everyday glassware assemblies. Produced by manufacturer Witeg, the PTFE construction is suitable for typical laboratory glassware connections where a fluoropolymer intermediate layer is required. Ground joint sleeves of this type are placed over the male joint before assembly, creating a clean sealing surface within the NS 7/16 joint. The compact NS 7/16 size matches small-scale distillation, reaction and general wet-chemistry setups commonly found in research and analytical laboratories. This PTFE sleeve provides a simple, replaceable component for maintaining reliable ground-joint connections without altering the glassware itself.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Product type: Ground joint sleeve
- Joint size: NS 7/16
- Material: PTFE
- Wall thickness: 0,05 mm
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Distillation & extraction glassware
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Distillation heads, adapters & columns
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Questions about PTFE-Sleeves ST 7/16
What is this article?
PTFE-Sleeves ST 7/16 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Distillation heads, adapters & columns, inside Distillation & extraction glassware, in Labware.
A still head, an adapter or a column is the glass between the boiling flask and the condenser. A Vigreux or packed column gives the vapour a surface so a closer-boiling mixture can separate. The joint sizes at both ends have to match the flask and the condenser.
Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Distillation & extraction glassware. The sub-category is Distillation heads, adapters & columns. The catalogue is Labware.
Shelves beside this one are Condensers, Ground-joint glassware (other) and Soxhlet & extraction apparatus.
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.