The Ground-Glass Joints category covers equipment and consumables used to separate liquids, solids and dissolved components by differences in volatility, solubility, particle size, density or affinity. These products are not isolated purchases, because their performance is tied to the sample, surrounding equipment and the way the wider method is carried out.
Correct glassware geometry, membrane selection, vacuum level and chemical compatibility directly affect recovery, purity and processing time. A well-matched setup balances sample volume, chemical compatibility, temperature and vacuum conditions, and pore size or retention, helping the laboratory avoid unnecessary rework, difficult cleaning or premature replacement.
Most methods combine sample preparation with a selected separation mechanism, controlled transfer or heating, collection of the target fraction and cleaning between runs. When each stage is matched correctly, laboratories in chemistry, food, environmental, pharmaceutical, industrial and teaching laboratories can work more consistently and manage changeovers, replenishment and maintenance with fewer interruptions. As part of the Distillation, Separation & Filtration Equipment range, these products can be selected with the equipment and consumables used before and after this stage.
Our Ground-Glass Joints range
Our collection covers gl and ns fittings, ground-glass joints formats, specifications and compatibility, lenz-laborglas attachable components be welded to any glass, and screwthread tubes useful for glassblowers, giving laboratories practical choices for routine work and more specialised applications.
GL and NS fittings
NS fittings are ground glass joints that rely on a friction fit (often with grease or clips), while GL fittings are threaded tubes designed to accept plastic or glass screw caps. Selection should take account of sample volume, chemical compatibility, and temperature and vacuum conditions. It is also worth checking cleaning, replacement and storage requirements before the item becomes part of a routine procedure. In practice, this supports efforts to build a compatible separation train that protects recovery and reduces unnecessary transfers. It also gives staff a clearer and more repeatable procedure when multiple users or shifts share the same equipment.
Ground-Glass Joints formats, specifications and compatibility
NS stands for "Normal-Schliff" (standard ground joint). The numbers represent the diameter (14 mm) and the length (23 mm) of the ground surface, ensuring a perfect fit with any other NS 14/23 component. When comparing options, consider chemical compatibility, temperature and vacuum conditions, and pore size or retention. The correct choice should fit the sample, expected workload and any equipment already used in the method. Used correctly, this part of the range helps laboratories build a compatible separation train that protects recovery and reduces unnecessary transfers. The result is a setup that is easier to train, document and maintain.
Lenz-Laborglas attachable components be welded to any glass
These components are made from borosilicate glass and are designed to be welded by professional glassblowers to other laboratory-grade borosilicate glassware to maintain thermal resistance. When comparing options, consider temperature and vacuum conditions, pore size or retention, and connection size. The correct choice should fit the sample, expected workload and any equipment already used in the method. Within the wider method, these products help laboratories build a compatible separation train that protects recovery and reduces unnecessary transfers. They should be reviewed together with associated consumables, accessories and cleaning requirements.
Screwthread tubes useful for glassblowers
Screwthread tubes, such as the Lenz GL 14 or GL 32, allow glassblowers to add threaded ports to custom apparatus, enabling the easy attachment of sensors, thermometers, or tubing via GL caps. When comparing options, consider pore size or retention, connection size, and separation principle. The correct choice should fit the sample, expected workload and any equipment already used in the method. Used correctly, this part of the range helps laboratories build a compatible separation train that protects recovery and reduces unnecessary transfers. The result is a setup that is easier to train, document and maintain.
Featured brands
DWK Life Sciences is known for laboratory glassware, bottles and precision handling products, BRAND is known for liquid-handling products, volumetric labware and supporting accessories, LLG Labware is known for practical laboratory consumables, accessories and routine bench supplies, and VACUUBRAND is known for chemistry vacuum pumps, controllers and vacuum-network components. Compare each BRAND by sample volume, chemical compatibility, temperature and vacuum conditions, and pore size or retention, and check what is included with the product so the complete setup is clear before ordering.
Why choose LabFriend for Ground-Glass Joints
Choosing laboratory ground-glass joints often involves more than matching a size or model number. LabFriend's knowledgeable team can help you review sample volume, chemical compatibility, temperature and vacuum conditions, and pore size or retention and check how the product fits with existing equipment, samples and procedures. Our 100% online range keeps competitive pricing and lead-time information visible, while fast and reliable shipping across Australia supports both planned projects and routine replacement orders.
A dependable laboratory distillation, extraction, separation and filtration setup is built from compatible parts, not one product in isolation. Useful related areas include Laboratory Ground-Glass Stoppers and Laboratory Glass Fibre Filters, which can help complete the surrounding workflow. By sourcing laboratory ground-glass joints and its supporting items through LabFriend, laboratories can simplify ordering, keep lead times visible and prepare for both routine use and future replacement needs. Add items to your cart and select Instant Quote.
