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.

  • 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…

  • 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.

  • 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…

  • 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

  • Heavy-duty nylon, 3-way control with locking fittings on all ports. 

  • 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…

  • 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

  • Hi-vac valve with two sidearms sealed to the barrel at a 180° angle to one another and on the same plane.

  • 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…

  • Polypropylene Stopcock with PTFE Plug

    Bel-Art - SP Scienceware

    Stopcock to control airflow in a vacuum desiccator, for use with Bel-Art Scienceware desiccator models F42025, F42020, F42010, F42012, F42022 and F42027 Body constructed of polypropylene for strength, thermal performance, and solvent resistance, and plug and washer of polytetrafluoroethylene…

  • 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,…

  • Hollow plug, double oblique bore stopcock is precision ground with corresponding numbers on barrel and plug. Lower vacuum chamber is evacuated with a separate hole in the plug which is not in the line of flow.

  • Very sturdy and robust spigot made of stainless steel AISI 304 (1.4301). The outlet of the spigot turns 360° so it can be adjusted to any required position. With a practical suspension device for filling container and eyelet for shutting off the spigot. Seals PTFE, FKM Self-closing …

  • 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 …

  • 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

  • Replacement stopcock plugs with inlet feeds for rotary evaporators. Codes -08, -10 for Buchi assemblies and -20 for Heidolph 4000 series. All plugs are 19/38.

  • Labeled Bench Service Stopcocks

    Water Saver Faucet Co.

    Of chrome-plated brass Spring-loaded ground key stopcock with index labeled gas, air or vacuum Maximum recommended gas line pressure 10 psi (69 kPa) Have 3/8” i.p.t. male thread and serrated outlet 48 mm long, which tapers from 13 mm to 6 mm. Outlet bore 3 mm without flange.

  • Full length stoppers, closed at bottom, with penny head Conform to ASTM Standard E 675

  • Double oblique bore stopcock plugs available in 1:5 PTFE or Borosilicate.

  • The StopCock discharge cocks fits all containers with G 3/4" connection threads. Thread adapters facilitate connection of cocks to nearly all containers. Fitting hose nozzles for StopCock available with outer thread Tight-closing for complete seal Especially effortless With…

  • Stopcock adapter, inner joint bottom, #7 top, stopcock side arm with PTFE plug and hose connection end. Supplied bushing and FETFE o-ring allows compression seal with thermometers, bleed tubes, etc. Will accomodate thermometers or tubes up to 7mm OD. F

  • These high performance Rotaflo® 90° angle stopcocks can be adjusted from a 0 to 6mm bore opening and have 10mm O. D. sidearms. They are designed so that only chemically resistant Polytetrafluoroethylene (PTFE) and PYREX® borosilicate glass are in contact with liquids and gases. …

  • 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.

  • These high performance Rotaflo® three-way stopcocks can be adjusted from a 0 to 3mm bore opening and have 8mm O. D. sidearms. They are designed so that only chemically resistant polytetrafluoroethylene (PTFE) and PYREX® borosilicate glass are in contact with liquids and gases. The Rotaflo®…

  • Stopcock, 4 mm, w/o Plug

    DWK Life Sciences (Kimble)

    Without Teflon plug Offered in 4 mm bore size; see 8682B34 for stopcock

  • These high performance Rotaflo® 90° angle stopcocks can be adjusted from a 0 to 3mm bore opening and have 8mm O. D. sidearms. They are designed so that only chemically resistant Polytetrafluoroethylene (PTFE) and PYREX® borosilicate glass are in contact with liquids and gases. The Rotaflo®…

  • 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

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

  • Straight connecting adapter, 4mm glass plug stopcock, 15mm O-Ring top joint and either a spherical joint or an inner standard taper joint on the bottom.

  • Teflon Double Oblique Bore Stopcock

    DWK Life Sciences (Kimble)

    With nut, washer and O-ring Two mm bore

  • CHEM-VAC™ valve glass portion only. Valve has two sidearms sealed to the barrel at a 180º angle to one another and bent to minimize hold up of fluids. Heavy duty rounded coarse thread and precision formed tapered seat.

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