Stoppers
Stoppers, also known as bungs, are used to give an airtight seal to laboratory flasks and test tubes by fitting tightly inside the neck of the container and preventing material from spilling. Stoppers can be made of glass, cork, rubber, or silicone. They are typically designed with a conical shape, but straight, flanged, and tapered options are also available.
Stoppers are the preferred choice for many applications requiring a tighter seal or a greater degree of chemical resistance. They also provide a good seal when a solution needs to be shaken or mixed without spilling. Stoppers are generally cylindrical in shape and have a tapered bottom end. They may be marked with a stopper number or size on the top and bottom diameters of the stopper. Sizing can vary among manufacturers.
Stoppers are available in a solid design or with holes known as positions placed in the top. Positions allow easy access to the material contained in the sealed vessel by pipettes, tubing, or other equipment without full removal of the stopper.
What Types of Stoppers Are Available?
• Turnover stoppers have external serrations to create an excellent internal seal combined with a flexible turnover sleeve that folds down over the container’s neck to create a double seal
• Serum bottle or vial stoppers have two or three legs with external serrations or straight sides and a flanged top to create an airtight seal
• Straight bromobutyl plug-type stoppers provide a maximum seal for vials and serum bottles with a straight-wall glass finish
• Ultra-pure, straight bromobutyl plug-type stoppers provide high chemical purity and low gas permeability. They offer excellent performance during freeze drying processes such as lyophilization, where stoppers must remain stable during transfer and sublimination phases
• Silicone recessed septa stoppers are non-toxic and have external serrations to create an effective internal seal
Grainger K4796 Silicone Round Cord 5/16 D 25 L 70A Blue
The Silicone Round Cord Metal is a silicone rubber cord with a metal core that is flexible and durable. It has a temperature range of -60°F to 500°F and comes in multiple diameters and lengths. The cord has good electrical insulation properties and high tensile strength. It is often used for applications like weatherstripping, gasketing, binding, and holding. This product can provide flexibility while maintaining shape in high heat environments. The metal core offers rigidity while the silicone exterior provides insulation against electricity, moisture, and weather.
Ace Glass, Inc. #80 Ace-Thred solid PTFE plug, 7855-764 FETFE O-ring front seal
#80 Ace-Thred solid PTFE plug with front seal O-ring, for sealing column ends. Permits preparation and storage of columns. Supplied with size -235 FETFE O-ring.
Uline Silicon Rubber For Extra-Long Tabletop Impulse Sealer
Silicon Rubber For Extra-Long Tabletop Impulse Sealer
Ace Glass, Inc. 250mL gas wash stopper only, porosity B
250mL gas wash stopper with porosity B (70-100micron) fritted disc.
Foxx Life Sciences Borosil® Amber Solid Penny Head Glass Stopper with Interchangeable Ground Joint 34/35, 20/CS
Borosil® Amber Solid Penny Head Glass Stoppers are with Interchangeable Ground Joint and can be used with Volumetric Flask of 5645, 5647 families or for other suitable joints. Manufactured with low extractable quality grade USP Type I, 3.3 Borosilicate Glass confirming to ASTM E438 Class A requirements. Available in sizes of 7/16 to 55/54. Amber blocks 300nm to 500nm. In collaboration with Borosil Glass Works, Foxx Life Sciences is proud to bring the outstanding quality of Borosil® Type 3.3 Borosilicate glassware to North America for the first time. Manufactured from the same USP Type I, Borosilicate glass that North American scientists have come to trust, Borosil® Laboratory Glassware offers unparalleled mechanical strength, clarity, and reliability at competitive prices. And thanks to a unique annealing process, Borosil® Glassware is stress-free and incredibly resistant to thermal shock.
Chemglass Life Sciences Stopper, Pennyhead, Hollow, 55/50
Stopper, Pennyhead, Hollow, 55/50. Hollow stopper with closed bottom.
Med Vet International 2.4mm x 45mm 6-Hole Compression Plate, J1074C
Many fractures in feline and small canine patients are too small for the 2.0mm DCP and the 2.7mm CDP is too large.The difference between these plates is enormous compared to the difference between 2.7 and 3.5 CDPs. The AMI (resistance to bending) of the 2.7 CDP is 20 times stiffer than the 2.0 DCP. The AMI of the 2.4 DCP is 10 times that of the 2.0 DCP.The solution is a 2.4 series of plates and screws. The plates in both size and strength are midway between 2.0 and 2.7 DCPs. The range and specifications are shown below. The standard 1.5mm hex screwdriver (used for 1.5 and 2.0 screws) is required. The pilot drill is 1.8mm and dedicated instrumentation such as load/neutral guides are also available.
Ace Glass, Inc. Septa, white rubber, sized for 9-12mm OD tubing, pk/144
Septa, white rubber, sized for 9-12mm OD tubing, pk/144
Analytical Sales & Services 20ml Syringe with Rubber Piston, 500/Case
20mL Syringe with Rubber Pisto
Med Vet International Titanium 8-Hole Plate, J1072NFT
TTA (Tibial Tuberosity Advancement) CagesTitaniumPlate 8 hole x 104mm