Stopcocks
Stopcocks
Thermo Scientific™ Nalgene™ Three-way Stopcock

Experience in-house fluid transfer system flexibility with this three-way stopcock, arranged in a T-shape to simply any two — or all three — arms of the stopcock with ease.
Thermo Scientific™ Nalgene™ Stopcocks

Develop in-house fluid transfer systems for accurate filling or dispensing. These stopcocks provide reliable, accurate liquid flow control.
PYREX™ Plain Bore Rotaflo™ Stopcock
Combined PTFE and borosilicate glass forms a leak- and freeze-resistant seal
DWK Life Sciences Kimble™ Replacement Stopcock
Replacement for 17062F Series Burets
Promotions are available
DWK Life Sciences Kimble™ Stopcock Plugs
Parts: PTFE nut, rubber washer and PTFE washer
Promotions are available
DWK Life Sciences Kimble™ KIMAX™ Burets with Threaded Closures Replacement PTFE Stopcock Assembly
Replacement stopcock for educational buret 17121H.
Promotions are available
DWK Life Sciences Kimble™ KIMAX™ Buret PTFE Stopcock Assemblies
For 03-700-12 Series burets.
Promotions are available
DWK Life Sciences Kimble™ Kontes™ FlexColumn™ Three-way Luer Stopcock
Heavy-duty nylon
Promotions are available
DWK Life Sciences Kimble™ Kontes™ PTFE Plug for Straight Bore Stopcocks, Size 2
PTFE Stopcock Plug size 11/25 for 2mm bore size
Promotions are available
Bel-Art™ SP Scienceware™ Replacement Stopcocks
Polypropylene body has Teflon™ PTFE plug, washer and bright red handle
Synthware™ 90° High Vacuum Hollow Plug Stopcock

Precision ground with corresponding numbers on the barrel and plug.
Synthware™ Straight Bore Glass Stopcock

Plugs and barrels are ground to be interchangable.
Synthware™ Double Oblique Bore Glass Stopcock

Double Oblique Bore Stopcock has diagonal, parallel bores to allow connection of single stem to both stems on the opposite side. Hollow glass plug option is precision ground with corresponding numbers on the barrel and the plug
Synthware™ Straight Bore High Vacuum Glass Stopcock

Plug is precision ground and hand lapped with corresponding numbers on barrel and plug.
Synthware™ Oblique Bore Hollow Plug High Vacuum Stopcock

Stem OD: 10 or 16 mm, with hollow plug, Precision ground with corresponding numbers on the barrel and the plug.
Synthware™ Replacement for Straight Bore Glass Stopcock, Plug Only

Glass plug ONLY.
Synthware™ Offset High Vacuum Hollow Plug Stopcock

Stem OD: 8, 10 or 12 mm available, with hollow glass plug, Precision ground with corresponding numbers on the barrel and the plug.
Synthware™ Straight Bore Stopcock

Straight Bore Stopcock with a threaded pressure nut. Stopcock barrels are polished to prevent leakage due to uneven surfaces.
Synthware™ Replacement Straight Bore Stopcock

Supplied with PTFE plug, one PTFE washer and one O-ring.
Bel-Art™ SP Scienceware™ Two-Piece Stopcocks
Two-piece design snaps together forming a tight seal, and the free-turning key needs no lubrication
Synthware™ Replacement Metering Stopcock

Stopcock comes with a threaded PTFE needle valve for the fine control of flow through the bore of the stopcock plug.
Synthware™ Replacement 120° Bore Stopcock

Stopcock has bores to allow connection of any two arms at once.
Synthware™ Double Oblique Bore PTFE Stopcocks

Double Oblique Bore Stopcocks have diagonal, parallel bores to allow connection of single stem to both stems on the opposite side.
Synthware™ 120° Bore Stopcock

Bored to allow connection of any two arms at once.
Synthware™ High Volume Double Oblique Bore Glass Stopcock with Constant Pressure Retention

Barrel and plug are precision ground, handlapped with corresponding numbers on the barrel and plug.
Synthware™ Replacement for T-Bore Glass Stopcock, Plug ONLY

Glass plug ONLY.
Synthware™ Replacement Double Oblique Bore Stopcock

Double Oblique Bore Stopcock has diagonal, parallel bores to allow connection of single stem to both stems on the opposite side.
Synthware™ Replacement T-Bore Stopcock

Plug has a T-shaped bore to connect any two or all three stems.