Stopcocks

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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.

  • PTFE Valves

    Chemglass

    VALVES, IN-LINE, PTFE TIP, Hi-vac valve with bent arms to minimize hold up of fluids that would occur in conventional valves. Designed with a precision external thread for fine control. VALVES, 3-WAY, PTFE TIP, Hi-vac valve with three way configuration for use in construction of manifolds,…

  • Organic Chemistry Labset Kit

    Chemglass

    ORGANIC CHEMISTRY LABSET KITS, 19/22, Chemglass organic chemistry kits contain the basic glassware required to perform basic experiments such as vacuum or atmospheric distillation, reflux or reflux with addition, extraction as well as other organic experiments. Each kit contains the 14 glass items…

  • Centrifuge Tubes

    Chemglass

    TUBES, CENTRIFUGE, 50ML, Centrifuge tube with a short, conical bottom and 24-415 GPI threaded top. Fits I.E.C. shield number 320. Supplied complete with a Poly-Seal® polypropylene lined phenolic screw cap. TEST TUBE TONGS, Tongs are made of zinc coated steel, 6" overall length. Spring…

  • Sciencware® Stopcocks

    Bel-Art - SP Scienceware

    2-way and 3-way Connections This polypropylene stopcock has a detachable, watertight and inert Teflon® PTFE plug that contacts any fluid being dispensed. The barbed fitting end accepts 6.4 to 9.5mm (1/4 to 3/8") I.D. tubing. Three-way models allow connection of two or three arms. Pressure…

  • Adapter, Distillation, Pilot Plant

    Ace Glass

    Distillation adapter for use with Pilot Plant reactors. Simple design collects the distillate above a PTFE stopcock with swagelok compatible take-off. Available with either one or two upper joints.

  • Stopcock Grease, 150 gram Tube

    Hach

    For lubricating ground glass joints, glass stopcocks and valves, Tensette Pipets, and for sealing desiccators. Lubricant has low vapor pressure and resists attack by acidic and alkaline solutions.

  • Three-Way Polypropylene Stopcocks with Teflon Plug

    Thermo Scientific Nalgene

    Similar to 8652N30 series, but with three arms Stopcock has T-shaped bore for connecting any two or all three arms Offered in 2 mm and 4 mm bore sizes Arms serrated to take 1/4 to 3/8 inch tubing

  • Teflon Straight Bore Stopcocks

    DWK Life Sciences (Kimble)

    Complete with nut, O-ring, washer For replacement in glassware originally supplied with Teflon straight bore plugs

  • Nalgene Polypropylene Straight Bore Stopcocks

    Thermo Scientific Nalgene

    Polypropylene with Teflon® TFE plug No lubrication required Offered in 2 mm and 4 mm bore sizes Arms are five-mm bore, serrated to take 1/4 to 7/16 inch rubber tubing

  • Stopcock, Metering Valve, 1:5 PTFE Plug

    Ace Glass

    Metering valve, with 1:5 PTFE straight bore plug, provides fine control of rate of flow. With polished barrels. For plug only, see 8232.

  • SYNTHWARE High Vacuum Valve Plugs

    Kemtech America

    High Vacuum Valve Plug, Synthware, Size: 0-4, 0-8, and 0-12mm available, Stem Material: PTFE,O-rings Material: Viton.

  • Stopcock, Three-Way, T-Bore

    Ace Glass

    3-way stopcock with T-bored solid glass plug. See Ace 8228 family for replacement plugs.

  • Stopcock, High Pressure, T-Bore

    Ace Glass

    Three-way high pressure T-bore stopcock with solid plug.

  • SYNTHWARE PTFE Stopcock Plugs, Metering Valve

    Kemtech America

    Stopcock Plug, Metering, PTFE, Synthware, Bore: 2 or 4mm available, Plug Size: 11/25 or 15.2/30 availabe, with threaded PTFE needle valve for the fine control of flow through the bore of the stopcock plug.

  • Stopcock adapter, top outer joint, bottom inner joint, PTFE plug

    Ace Glass

    Stopcock adapter, top outer joint, bottom inner joint, PTFE plug. Spherical joint versions are both outer joints top and bottom.

  • T-Bore Glass Plug Pressure Stopcocks

    Chemglass

    T-BORE, Similar to CG-458, but with three stems sealed 90º apart. Solid glass plug has a "T" shaped bore so that any two or all three arms can be connected at one time. Plug is precision ground and hand-lapped with corresponding numbers on the barrel and plug. DOUBLE OBLIQUE BORE,…

  • Pressure Release Bubbler

    Chemglass

    BUBBLERS, HIGH CAPACITY, CHECK VALVES, High capacity check valve bubbler keeps oil and air from being drawn into a reaction system when negative pressure is developed. Bubbler has two 1/2" swagelock type fittings on top permitting one side to be connected to the nitrogen source and one side to…

  • PTFE Straight Stopcock Plugs

    DWK Life Sciences (Kimble)

    PTFE stopcock plug has a 1:5 taper PTFE  is chemically-resistant and self-lubricating

  • SYNTHWARE PTFE Stopcock Plugs, Straight Bore

    Kemtech America

    Stopcock Plug, Straight Bore, PTFE, Synthware, Bore: 2, 4, and 6mm available, Plug Size: 11/25, 15.2/30 and 16/35 available, supplied with PTFE plug, one PTFE washer and one o-ring.

  • HI-VAC® Straight Valves with Tip O-Rings and CTFE Plug

    DWK Life Sciences (Kimble)

    This straight high-vacuum valve is for use in vacuum applications up to 5 x 10-7 Torr. Designed with a precision external thread for fine control Can be used as a bleed up to 1/2 turn Full open position is at 1-1/2 turns Primary seal is made with a FKM o-ring on a tapered seat …

  • SYNTHWARE Glass Interchangeable Straight Bore Stopcocks

    Kemtech America

    Stopcock, Straight Bore, Glass, Synthware, Bore: 2, 4 and 6mm available, , Stem OD: 8, 10, and 12mm availabe, plugs and barrerls are ground to be interchangable.

  • Glass Plug Straight Bore Stopcocks

    Chemglass

    The 2mm through 6mm bore sizes are supplied complete with the listed size metal retaining clip CG-423. The 8mm and 10mm bore sizes are supplied with a #29 and #34 CG-145 Keck clip respectively.

  • Teflon Double Oblique Bore Stopcock

    DWK Life Sciences (Kimble)

    With nut, washer and O-ring Two mm bore

  • Stopcocks

    Chemglass

    For replacement or construction of burets having a 1:5 PTFE stopcock plug. One arm is pulled to a delivery tip.

  • Straight Bore Glass Plug Stopcocks

    Chemglass

    STOPCOCKS, STRAIGHT BORE, GLASS PLUGS, CAPILLARY ARMS, Similar to CG-400, but with the sidearms being made of capillary tubing having the same bore as the plug. Supplied complete with metal retaining clip CG-423. STOPCOCKS, STRAIGHT BORE, SCHLENK, GLASS PLUGS, This stopcock is especially…

  • SYNTHWARE High Vacuum Valve Metering Plugs

    Kemtech America

    High Vacuum Valve Meteing Plug, PTFE Protected, Synthware, Size: 0-4, 08 and 0-12mm available.

  • Exposed O-ring Tip Valves

    Chemglass

    VALVES, IN-LINE, EXPOSED O-RING TIP, Hi-vac valve with bent arms to minimize hold up of fluids that would occur in conventional valves. Designed with a precision external thread for fine control. VALVES, 3-WAY, EXPOSED O-RING TIP, Hi-vac valve with three way configuration for use in construction…

  • Stopcock, Vacuum, PTFE, Low Hold-Up

    Ace Glass

    Threaded vacuum stopcock with PTFE plug and new hooded handle that permits smooth needle valve adjustment down to 0.1cc/min. flow rate. In-line design of barrel offers less hold-up than with 8192 design. Double PTFE ring seals prevent exposure of FETFE

  • Stopcock, 2 mm

    DWK Life Sciences (Kimble)

    As supplied with 1983J70 and J76 Kimble Economy Burets Plug bore two mm Also for replacement on Kimble 17800 and 17810 series Chromatography Columns and Kimble 29050-H and 29060-H series Separatory Funnels.

  • Scienceware® Stopcocks

    Bel-Art - SP Scienceware

    2-Piece design requires no lubrication A quarter turn shuts off flow. Maximum pressure rating: 48 KPa (7 psi), 50cm of water. Easy, snap-together assembly creates a tight seal Select a size betweento fit tubing of 3/8 or ½" (9.5 or 12.7mm) I.D. Barbed connections

  • Metal Retaining Clips for Glass Stopcock Plugs

    Chemglass

    Metal retaining clip is designed to apply pressure against the stopcock plug and barrel. Clips eliminate blow-out and loose fit while minimizing freezing. They are made from high carbon tempered spring steel having a green corrosive resistant, phosphate base finish.

  • SYNTHWARE High Vacuum Valves, 90 Degree, Metering

    Kemtech America

    High Vacuum Valve, Metering, 90 degree, Synthware, Size: 0-8mm, Side Arm OD: 9mm.

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