Description
BOLA ground joint clamps NS 45/40 with steel spring core are robust laboratory fittings designed to connect larger standard ground joints in glass apparatus. Built around a PTFE-encapsulated steel spring core, they ensure that process media touch only polytetrafluoroethylene, giving universal chemical resistance in demanding laboratory environments. The NS 45/40 nominal size suits larger conical ground joints frequently employed in preparative synthesis, larger-scale distillation and multi-neck flask assemblies. Supplied as a pack of 3 pieces, these clamps from manufacturer Bohlender combine firm spring tension with a fully inert outer surface. PTFE encapsulation isolates the steel core from corrosive media while sustaining consistent clamping force on Normschliff connections. Each unit has a net weight of 0,0242 kg, offering a solid yet manageable accessory for assembling substantial glassware trains. The design supports secure joining of standard ground joints without introducing metallic contact into the chemical path. Ideal for conical and related ground-joint work, they serve as a reliable laboratory accessory where chemical inertness and mechanical holding strength are both required.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 3 pc(s)
- Brand: BOLA
- Material: Polytetrafluoroethylene (PTFE)
- Joint size: NS 45/40
- Construction: PTFE-encapsulated steel spring core
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Questions about BOLA Joint Clamps, NS 45/40 With steel spring core, for connection of standard g
What is this article?
BOLA Joint Clamps, NS 45/40 With steel spring core, for connection of standard g is the article on this page. Luminix Health distributes Bohlender for laboratory use. It sits in Clamps & bossheads, inside Stands, clamps & racks, in Labware.
A bosshead grips the rod. A clamp grips the flask or the condenser, usually through two jaws with cork or vinyl faces. Three-finger and two-finger clamps hold different shapes. The jaw opening is the specification.
A stand, a clamp and a rack hold something still so the hands can do the work. A bosshead locks a clamp to a rod. A test-tube rack keeps tubes upright and in an order the operator can read back. The failure is almost always mechanical: the clamp slips, or the rack does not match the tube diameter. The glass they support is indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stands, clamps & racks. The sub-category is Clamps & bossheads. The catalogue is Labware.
Shelves beside this one are Test tube racks, Stands, rods & bases and Stand & rack 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. Delivery across Europe, two to five days when in stock. 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.

