Description
Ground joint retainers NS45 POM are laboratory clamps engineered to secure conical ground-glass joints in the NS 45/40–45/50 size range. Produced from polyoxymethylene (POM), they supply reliable mechanical retention for glassware setups employed in distillation, reflux and synthetic chemistry. Each piece weighs 0,024 kg net and is delivered in a pack of 10 units, facilitating ready availability of this larger joint size. The POM material combines mechanical strength with good chemical resistance, allowing repeated assembly cycles without significant wear. These retainers from manufacturer Witeg match standard conical joints and help prevent unintended separation during heating, agitation or vacuum applications. Their compact form factor fits cleanly onto multi-neck flasks, condensers and connecting adapters without crowding neighbouring components. Appropriate for teaching, research and quality-control laboratories, the NS45 POM ground joint retainers offer a practical means of keeping larger ground-glass connections firmly closed throughout routine experimental work.
This article is part of Ground-joint glassware (other), in Distillation & extraction glassware.
Key features
- Pack size: 10 pc(s)
- Material: POM (polyoxymethylene)
- Joint size: NS 45/40–45/50
- Country of origin: Spain
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Category
Distillation & extraction glassware
Sub-category
Ground-joint glassware (other)
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Questions about Clips for joints ST 45
What is this article?
Clips for joints ST 45 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Ground-joint glassware (other), inside Distillation & extraction glassware, in Labware.
This is ground-joint glassware that is not a head, a condenser or a Soxhlet: receivers, blank joints, odd adapters. A ground joint is named by the wide end and the length, such as 29/32. Mismatched joints do not seal, even with grease.
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 Ground-joint glassware (other). The catalogue is Labware.
Shelves beside this one are Distillation heads, adapters & columns, Condensers 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?
We deliver across the EU, usually within 2 to 5 working days. More is on Delivery across the EU. 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.

