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
Med Vet International "T"-Plate, 2mm, 4 hole, 18mm L, J0428A
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 Compression Plate 4.5mm, 4-hole, 71mm L, J0427C
Use with 4.5mm cortical screws to produce fracture-site compression.
Chemglass Life Sciences Rubber Stopper, #15, Two Holes, Black
Rubber Stopper, #15, Two Holes, Black. Similar to CG-3026 and CG-3027 except with two holes. 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 (103mm), Bottom (83mm). Length: (39mm). Diameter of holes: (5mm).
Grainger Stopper Sz 13.5 62 mm BDia Black 0 PK3
The 16WC40 is a 16-inch diameter, 40-inch long, carbon steel pipe nipple with National Pipe Thread ends. It has a wall thickness of 0.280 inches and is made from ASTM A53 Grade B ERW pipe. This nipple is typically used to connect and extend threaded pipe. It can withstand pressures up to 700 psi and temperatures up to 850°F. The nipple has a black finish and weighs approximately 27 pounds. It is made in the USA.
Ace Glass, Inc. Pk6 50mm 10 microliter, 26 gauge, 20° bevel removable needle syringe.
Pk6 50mm 10 microliter, 26 gauge, 20° bevel removable needle syringe.
Chemglass Life Sciences Rubber Stopper, #4, One Hole, Black
Rubber Stopper, #4, 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 (26mm), Bottom (20mm). Length: (25mm). Diameter of hole: (5mm).
Grainger Stopper Sz 15 83 mm BDia Black 0
The 16WC60 is a 60-watt, 120-volt A19 medium base LED light bulb made by GE Lighting. This bulb produces 800 lumens of soft white light at a color temperature of 2700K. It has an estimated yearly energy cost of $7 and an average life of 15,000 hours. This bulb can be used in enclosed fixtures and is dimmable. It measures 4.25 inches in length and 2.375 inches in diameter. The 16WC60 provides an energy-efficient LED alternative to traditional incandescent bulbs.
Sigma Aldrich Fine Chemicals Biosciences Precision SealR rubber sep
The recommended choice for use with organic chemicals and solvents pressure applications and cannulation techniquesPrecision Seal septa are designed specifically for the rigorous requirements of chemical applications.Precision fit Precision Seal septa have a longer tapered plug that seats firmly inside the glass joint or tube providing a sealing surface that is 50 to 80% greater than standard sleeve stoppers. The inner seal design of Precision Seal septa minimizes chemical and solvent vapor migration up the joint to the sleeve which can swell leak or fail from exposure. The surface texture of the rubber is similar to that of a ground glass joint and resists movement once seated.Non-contaminating Precision Seal natural rubber is lower in solvent extractables 1.9% vs. standard sleeve stoppers 5-6%. Precision Seal rubber is higher in density to minimize the effects of solvent degradation. They are manufactured from a single certified lot for absolute consistency.Safet