Clamps & bossheads

Measure your stand rod first: a bosshead only grips rods up to its stated maximum. Light setups often use 12 mm rods, for example with the aluminium double bosshead for rods up to 12 mm. Most retort stands take bossheads for rods up to 16 mm, such as the powder-coated double bosshead, 16 mm. DIN 12895 versions open to 16.5 mm, like the 18/10 steel bosshead to DIN 12895. Also check the clamp shaft: the stainless universal clamp, 0–80 mm has a 10 mm rod. Send us your rod size: sales@luminixhealth.com.

Aluminium is light and fine for dry, everyday setups. Zinc die-cast with a powder coating is the sturdy standard for most benches, as with the powder-coated double bosshead. Near acids, solvents, water baths or wet cleaning, stainless steel lasts longer: it does not corrode and is easy to wipe clean. Examples are the electrolytically polished stainless double bosshead, 16 mm and the stainless universal clamp, 0–80 mm, which has a rust-free screw. In a fume cupboard with aggressive vapours, stainless parts are the safer long-term choice.

A two-prong clamp holds flasks, condensers and columns firmly along their length and is the usual choice for distillation setups. The two-prong retort clamp with PVC lining, 220 mm has padded jaws to protect glass. A three-prong clamp centres round objects such as tubes, small flasks, funnels and electrodes, and grips from three sides. The three-prong clamp 0–40 mm with vinyl-coated jaws suits narrow glassware. For wide vessels, choose by clamping range rather than prong count, and make sure the jaws are coated when you clamp glass.

A fixed double bosshead joins two rods at a right angle. That is what most retort-stand setups need, and it is the most rigid option. A swivel bosshead lets you set any angle between the rods, which helps with inclined condensers, tilted funnels or awkward apparatus. The swivel double bosshead for rods up to 16 mm is zinc die-cast with nickel-plated brass screws. The 18/10 steel swivel bosshead, 16.5 mm rotates through 360°. For heavy loads, fixed is usually steadier. Questions about a setup? sales@luminixhealth.com.

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.

This shelf belongs to Stands, clamps & racks, inside Labware. Luminix Health distributes this range for laboratory use.

The neighbouring shelves are Test tube racks, Stands, rods & bases and Stand & rack accessories. The category above this shelf is Stands, clamps & racks.

Luminix Health distributes this range from the heart of Europe. We deliver across the EU in two to five days if 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. Send a quote request, contact the team, or read who we are. The full brand index is on shop by brand.

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