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.

  • 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…

  • 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

  • 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,…

  • 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…

  • 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.

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

  • Valve High Vac PTFE Sz 8

    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 …

  • 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…

  • PTFE Straight Stopcock Plugs

    DWK Life Sciences (Kimble)

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

  • 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.

  • 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.

  • 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…

  • Automatic, adjustable pressure relief valve is for use on apparatus where internal pressure build-up is a concern. Tension on the stainless steel spring is adjusted by turning the top control knob in or out and will relive pressures from 5 to 50 PSI. Two-piece stem is made of PTFE and is fitted…

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

  • Threaded vacuum stopcock comes with PTFE plug with hooded, bakeble handle. Needle valve version permits smooth valve adjustment down to 0.1 cc/min flow rate. Easy action version threads into heavy wall glass barrel also permitting smooth adjustment. Do

  • 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

  • Pedestal-style single or double cock for mounting on top or on splash shield of bench Maximum recommended line pressure 69 kPa (10 psig) Chrome-plated brass Spring-loaded stopcocks take included snap-in buttons labeled GAS, AIR or VACUUM (specify when ordering) Serrated outlets are 48 mm long,…

  • Teflon Double Oblique Bore Stopcock

    DWK Life Sciences (Kimble)

    With nut, washer and O-ring Two mm bore

  • 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 …

  • 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 and bottom o-ring joints, Easy Action plug,/p>

  • With solid plug. For plug only, see 8226.

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

  • 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

  • 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.

  • Oblique bore with polished barrels. For plug only, see 8226.

  • Adapter, Sampling

    Ace Glass

    With standard taper 24/40 joints and 1:5 solid PTFE stopcock plug connected to side of apron for removing distillate or sample. Plug bore is 2mm. Approximate capacity 125mL. Code -04 has #7 Ace-Thred after stopcock, code -29 has plain tubing.

  • CHEM-VAC™ valve has single sidearm sealed at a 90º angle to the barrel. This inexpensive configuration allows for the lower portion of the barrel to be sealed directly to the apparatus being constructed, making for more compact, stronger assemblies. Valve has a TFE plug with three…

  • Sublimation Apparatus, Synthware, Capacity: 100 or 150mL available, Flange Size: 57 or 80mm available, supplied complete with condenser, flask, O-ring and horseshoe clamp.

  • 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.

  • Commercially available spigots made of the materials polyethylene or polypropylene cannot be used for solvents. The spigot StopCock PA is made of electrically conductive polyamide and therefore perfectly suitable for solvents. StopCock PA fits onto 3/4" outer threads and with the…

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