Rings

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Attention Thomas Scientific Customers

Due to current pandemic, lead times for PPE items are longer than what is listed on our website. Please expect shipping delays of all PPE products during this time.

  • Support Rings

    Humboldt

    Wire Models and Extension Rings Wire Models Formed, bright basic wire circle is welded to shank (except 2" size). Aluminum muff. Attaches to support rods up to 3/4" (19mm) in diameter. Extension Rings Shank of Extension Ring clamps to support rods with clamp holder.…

  • For supporting round-bottom flasks, dishes, etc. All rings are 30 mm high with inside edge beveled

  • Cork Lab Rings

    GSC International, Inc.

    Cork lab rings are used to support round bottom flasks and protect table surfaces. They are all 30mm thick (height when laying on a surface) and vary by the diameter of the ring and the hole. Used to protect your expensive laboratory glass from breakage. Available in the following sizes: …

  • Thermometer designed for our Microscale spinning band Hickman-Hinkle column. Organic liquid filled with a yellow backing. Each thermometer is serialized and includes a Statement of Accuracy indicating traceability to NIST standards. 8 inch length with a 50mm immersion. Order code -40 retaining ring…

  • Cork Flask Stands

    United Scientific Supplies

    Made of fine particle compressed cork, these rings are designed to support round bottom flasks, beakers, dishes and more. Cork is naturally elastic with very low thermal and electrical conductivity properties. Small cork stand has a diameter of 100mm and holds 250ml to 2000ml round bottom flasks.…

  • Chemware® PTFE Raschig Rings come in two sizes to enhance the efficiency of random packing for chemical processes and liquid or gas transfer applications. Packing for distillation columns Chemically inert High surface area per unit of volume Minimum resistance to gas and liquid flow

  • O-ring for Chemglass reaction vessels and lids. Available in Viton, Silicone, Perfluoro, FEP encapsulated Silicone and FEP encapsulated S.S. spring. The S.S. spring maintains resilience even in long term exposure to cryogenic temperatures. Temperature Range: Viton: -30 to 200°C …

  • Raschig Rings

    Chemglass

    Rings are made of borosilicate glass and sold in one pound packages.

  • Viton® O-Rings

    Chemglass

    Viton o-ring is stocked in brown 75 durometer. They are suitable for acids, aliphatic hydrocarbons, oxidizing agents and all petroleum products. Viton has a low compression set and high temperature resistance. Viton is especially good for vacuum service and low gas permeability and has a useful…

  • Rings, Raschig

    Ace Glass

    Fabricated from Borosilicate glass. Wall weight on 5mm size is approximately 0.8, other sizes have wall weight of approximately 1.0/mm.

  • O-Ring

    Ace Glass

    O-Rings in a variety of sizes and materials. Please see o-ring materials chemical compatibility here: http://www.aceglass.com/downloads/eccc.pdf

  • Glass adapter with two end 15mm o-ring joints and a #15 Ace-Safe connector side port. Ideal for connecting components for Schlenk lines Made mainly for connecting the Shlenk or vacuum line to a vacuum gauge Ace Safe has 1/2-in ID hose connection for connecting vacuum tubing.

  • Ferrules, PTFE

    Ace Glass

    Thomas No. 1165H91 Ferrule, PTFE, 1/8inid hole, use with #7 Ace-Thred, pk12 Thomas No. 1165H92 Ferrule, PTFE, 3/16inID hole, use with #7 Ace-Thred, pk/12 Thomas No. 1165H93 Ferrule, PTFE, 1/4inid hole, use with #7 Ace-Thred, pk12 Thomas No. 1165H94 Ferrule, PTFE,…

  • Perfluoro O-Rings

    Chemglass

    One of the most thermally stable elastomeric materials available, Perfluoro is a family of perfluoroelastomer compounds designed to provide superior chemical resistance, and they offer a cost savings over similar o-rings such as Kalrez® 4079 and Chemraz®. Perfluoro o-rings are stocked in…

  • Replacement part for the QC8000, QC8500 and QC8500 Series 2.

  • These envelope style gaskets are machined using chemically resistant virgin PTFE and have a silicone core. The larger sealing surface results in improved sealing under full vacuum, as opposed to other o-ring materials. The machined in o-ring aids in sealing and centering of gasket on the Duran…

  • Material: borosilicate glass Description: Quantity: ~590/lb. L × O.D. × thickness: 6 mm × 6 mm × 1 mm

  • Split Polyamide loosening ring to enable inner and outer Rodaviss® members to be pulled apart in the event of freezing.

  • Kalrez® 4079 perfluroelastomer combines the elastomeric properties of Viton with the chemical resistance of PTFE, making it the best possible o-ring material available. Kalrez® 4079 should be considered for service in high temperature, corrosive environments such as: Polar Solvents…

  • Unique elastomer gasket is co-molded with two materials: Perfluoroelastomer with an outer Silicone centering ring. The chemically resistant perfluoroelestomer section is the only portion exposed to the wetted area of the reaction. The soft pliable sealing surface provides improved sealing under…

  • O-Rings are 70 durometer Viton.

  • 316 Stainless steel 1/8" NPT to #15 O-Ring adapter.

  • This envelope style gasket is machined using chemically resistant virgin PTFE and has a silicone core. The larger sealing surface results in improved sealing under full vacuum, as opposed to other o-ring materials. Gasket for use with 300mm Duran Flange on 30L and larger reactors.

  • 100 MM SEALING RING, VITON

    DWK Life Sciences (Wheaton)

  • Each kit contains a set of three o-rings, one for the tip and two for the barrel seal. If individual o-ring is required see CG-305 for Viton or CG-308 for Kalrez®.O-Ring Specifications:#006 Tip O-Ring#009 Shaft O-Ring

  • Class VI Perfluoroelastomer with 3 tabs each spaced 120 degrees apart along the outer edge to aid in gasket alignment. The chemically resistant perfluoroelestomer has a soft pliable sealing surface that provides improved sealing under full vacuum, as opposed to encapsulated o-ring materials and…

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