Support Ring With Boss Head, No. 3 Retort Ring

Retort Ring with Boss Head 3

Integrated Boss Head: Features a built-in heavy-duty clamp with a large thumb screw, providing a rock-solid grip on support rods without requiring additional accessories.

Corrosion-Resistant Finish: Coated with a high-quality, chemical-resistant finish (typically powder-coated or chrome-plated) to prevent rust and degradation from acid or solvent splashes.

₹245.00

Quick Answer: The Retort Ring with Boss Head 3 is a support ring with boss head attached, used to set a horizontal ring at any height on a retort stand. The listing photograph shows a black-finished ring on a short stem that ends in a hook-shaped clamp with a blue thumbscrew.

A Ring and Its Clamp in One Piece

A ring on a retort stand turns a single upright rod into a small shelf. Set just above a burner, it carries a wire gauze for heating a beaker, or a pipeclay triangle that cradles a crucible directly in the flame. Set higher, it takes the cone of a funnel or the bowl of an evaporating basin. Because this version has its fixing built on, the ring goes onto the upright in one movement and cannot be separated from its connector in a drawer.

The photograph shows the fixing as an open hook closed by a screw, not a closed collar. An open hook can be slipped onto the rod from the side, so the ring can be added below a clamp that is already holding glassware without lifting anything off the top of the stand. Tighten the blue knob by hand until the screw presses the rod firmly into the hook.

The number 3 distinguishes this listing from the Retort Ring with Boss Head 2 and from the Euro design ring in the same range. The title does not state what the number refers to. In ring hardware the variable that matters is the inside diameter, so measure the gauze, triangle or funnel you plan to use and quote that figure when ordering.

Typical Set-Ups

Heating a crucible to constant mass, with the ring holding a pipeclay triangle and the burner flame on the crucible base
Evaporating a salt solution towards crystallisation in a basin resting on a gauze
Holding a filter funnel above a conical flask for gravity filtration
Sitting just beneath a clamped flask or separating funnel as a back-up support

Care & Handling

After heating, leave the ring to cool in place; metal close to a burner stays hot for several minutes after the flame is out.
Turn the ring so it projects over the base of the stand, not away from it, before loading it with a full basin or beaker.
Keep the thumbscrew thread free of dried salt and splashed reagents, which make the screw bind and the finish flake.
Where the finish is chipped, dry the ring after washing so bare metal does not rust.

Specifications

Type	Retort ring with attached boss head (range number 3)
Ring finish	Black, as shown in the listing photograph
Fixing	Open hook clamp closed by a thumbscrew with a blue knob (as pictured)
Mounts on	Upright rod of a retort stand
Typical loads	Wire gauze, pipeclay triangle, evaporating basin, filter funnel
Inside diameter	Confirm at enquiry

Why Choose LabEquip

Chemistry departments tend to order rings by size, matching them to the gauzes and funnels already on the shelf. LabEquip lists this ring alongside its other stand fittings in the General Lab Products range, and the contact page is the place to give the diameter and quantity you need.

Frequently Asked Questions

How is the number 3 ring different from the number 2 ring?

The listing does not define the numbers. Rings in a range usually differ in inside diameter, and the photographs show different fixings: this one has a black ring and a hook clamp with a blue knob. Compare both against the item the ring must carry before choosing.

How do I heat a crucible using this ring?

Clamp the ring so the crucible will sit just above the inner blue cone of the flame. Lay a pipeclay triangle across the ring, place the crucible in it, and heat gently at first, then strongly. Move the crucible only with crucible tongs.

Can a ring hold a round-bottom flask?

A ring can support a round-bottom flask from below, but it should not be the only support. Clamp the flask at the neck and use the ring beneath it as a back-up, so the flask stays in place if the clamp slips.

Why does the hook-type fixing matter?

An open hook fits around the stand rod from the side. The ring can therefore be added or removed in the middle of a set-up without taking off the clamps above it.

Which way should the ring face on the stand?

Turn it so the ring lies over the base plate of the stand. A heavy load hanging beyond the edge of the base can tip the whole stand, especially a light one.

Is the ring safe to use directly over a flame?

Metal rings are routinely used above burners, but finishes differ in heat tolerance and the listing does not say what the black finish is. Keep the flame on the gauze or triangle rather than on the ring itself, and let it cool before handling.

Last Updated: September 2026