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
Ace Glass, Inc. #6 stopper accepted by 7478 reaction bottles.
#6 stopper accepted by 7478 reaction bottles.
Bellco Glass, Inc. Rubber STOPPER,#00
A laboratory rubber stopper is mainly used in chemical laboratory in combination with flasks and test tub. Made from rubber Closure of flask
Grainger Stopper Sz 10 42 mm BDia Black 0 PK8
The Grainger 16VC04 is a 4-ton capacity chain hoist with a lift height of 20 feet. It has a cast iron body and features a load brake, slack switch, and upper and lower limit switches for added safety and control. This electric hoist requires a 230 volt 3 phase power supply and has a lifting speed of 8 feet per minute. The hoist comes with 10 feet of lift chain, hooks, and is rated for indoor and outdoor use. With proper installation and maintenance, this rugged hoist provides reliable lifting for manufacturing and industrial settings.
Grainger Stopper Sz 4 20 mm BDia Black 0 PK30
The 16ZD45 is a 3M Novec 1230 Clean Agent Fire Extinguisher. It is UL rated 2-B:C and contains 5 lbs of Novec 1230 fluid. This clean agent extinguisher is intended for Class A, B, and C fires. It uses a non-conductive, non-corrosive agent that leaves no residue and is safe for use around sensitive electronics. The extinguisher has a chrome-plated steel cylinder with an enameled aluminum valve body and discharge hose. It comes equipped with a wall hook and pressure gauge. This compact and lightweight fire extinguisher is well-suited for computer rooms, telecommunication and medical facilities. It effectively suppresses fires while avoiding damage to valuable equipment.
Med Vet International "T"-Plate, 3.5mm, 6 hole, 55mm L, J0428G
Available for 3.5, 2.7, and 2.0mm screws, either cortical or self-tapping. "T" plates are used almost exclusively for the repair of fractures of the distal radius. In addition, they also may be used in a partial carpal arthrodesis.
Med Vet International Endotracheal Tube, J0148V, Red Rubber, 16mm, Each
Available in .5mm increments from 2.5 to 16.0mm. Murphy eye. Red rubber. Hard-to-find extra-large size now available. (adaptor not included except where specified)
Cole-Parmer Twistit white rubber stopper, size 6
Use these versatile Twistit stoppers as either a solid, one-hole, two-hole, or three-hole stopper. Simply twist off a bottom seal to open a hole. The soft resilient natural rubber stays pliable over a long period and withstands laboratory conditions without hardening. Stoppers retain resiliency even after repeated autoclaving. Each stopper has its size in raised figures on top. Available in black or white rubber. Autoclavable.
Chemglass Life Sciences Rubber Stopper, #5-1/2, One Hole, Black
Rubber Stopper, #5-1/2, One Hole, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (28mm), Bottom (24mm). Length: (25mm). Diameter of hole: (5mm).
Med Vet International Compression Plate 4.5mm, 6-hole, 103mm L, J0427E
Use with 4.5mm cortical screws to produce fracture-site compression.
Grainger 3 Hole - Center Tap Base Plate Double
The Tripp Lite 16U351 is a 19-inch open frame rack enclosure cabinet with a depth of 35 inches. It has an adjustable mounting depth from 22 to 35 inches and comes with mounting rails, leveling feet and a vented top panel. The steel enclosure has a weight capacity of 1000 lbs and is compatible with EIA-310-D mounting rails. The cabinet comes unassembled in a flat pack box to reduce shipping costs. Overall, the 16U351 provides an open and adaptable rack enclosure solution for mounting up to 16U of 19-inch rackmount equipment.
Chemglass Life Sciences Rubber Stopper, #9-1/2, One Hole, Black
Rubber Stopper, #9-1/2, One Hole, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (46mm), Bottom (38mm). Length: (25mm). Diameter of hole: (5mm).