Conical joint stopper borosilicate glass, NS 12/21, solid, octagonal grip

Conical joint stopper borosilicate glass, NS 12/21, solid, octagonal grip is the article on this page. Luminix Health distributes BRAND for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.

A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.

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.

The category is Stoppers, caps & closures. The sub-category is Ground-joint glass stoppers. The catalogue is Labware.

Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Lids & seals and Closures (other).

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.

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.

The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.