Heathrow Scientific Ground Glass Flask Stoppers - 3080 Series | Clear

Ensure an airtight, chemically inert seal for your volumetric flasks and laboratory vessels with Heathrow Scientific Ground Glass Flask Stoppers (3080 Series). Manufactured from premium clear borosilicate glass, these heavy-duty stoppers are designed as direct replacements for lost or broken volumetric flask closures. Because they are constructed entirely from glass, they offer absolute chemical resistance and will not degrade, crack, or contaminate your sample like rubber or silicone alternatives.

Each stopper features a precision-ground joint that creates a flawless friction fit with standard taper glassware, effectively preventing the evaporation of volatile solvents and protecting sensitive solutions from atmospheric contamination. The 3080 Series features a classic flat-head pennyhead design, allowing the stopper to be placed upside down on the laboratory bench to prevent the ground joint from picking up benchtop contaminants. Available in multiple standard stopper numbers (No. 9 through No. 27).

Features & Benefits

• Precision Ground Joint: Creates an airtight, leak-proof seal with standard taper glassware to prevent solvent evaporation.
• Chemically Inert: Solid glass construction will not leach contaminants or degrade when exposed to harsh laboratory chemicals.
• Pennyhead Design: The flat, widened top allows the stopper to rest inverted on the benchtop, keeping the joint clean during transfers.
• Fully Autoclavable: Can be safely subjected to standard steam sterilization protocols for reuse in critical environments.

Ordering Information & Specifications

Technical Specifications

LabSupplies.com is an authorized distributor of Heathrow Scientific. Ensure you select the correct stopper number to match the standard taper of your volumetric flask.