• Penny Head Stoppers with Ground Joint - Clear

Penny Head Stoppers with Ground Joint - Clear

OM-6600-06

  • Lab and Research

Vendor: OMSONS

Suited For: Lab and Research

Country of Origin: India

30-Day Limited Warranty
This product is covered against manufacturing defects in materials and workmanship for 30 days from the date of purchase.

This warranty does not cover: breakage caused by thermal shock (rapid heating or cooling); physical or mechanical damage, including drops, impacts, chips, and cracks from handling; damage from use outside the glassware's rated temperature, pressure, or chemical compatibility; damage from improper cleaning; normal wear such as scratching, staining, or discolouration; or unauthorised repair or modification.

To claim, contact SmartLabs within 30 days of purchase with proof of purchase and a description of the defect.
50 in stock
R 14.95
R 14.95
Tax included. Shipping calculated at checkout.
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Interchangeable Penny Head Glass Stoppers designed for standard laboratory ground glass joints. These stoppers are primarily used to seal volumetric flasks, mixing cylinders, and separatory funnels. 
 
Technical Specifications
  • Material: High-quality 3.3 Borosilicate Glass with high chemical and thermal resistance.
  • Design:
    • Standard Taper (1:10): Precision-ground to ensure interchangeability with any standard ground glass socket.
    • Drip-Tip: The lower closed end features a pointed tip to ensure adhered liquid returns to the vessel, preventing joint contamination.
    • Head Style: Available in Penny Head (flat circular grip) for volumetric flasks.
Available Sizes
 
These stoppers are categorized by their cone size to match specific capacities of volumetric flasks and reagent bottles: 
 
  Cone Size Application / Capacity
  10/19 Volumetric Flask (5, 10, 20, 25 mL)
  12/21 Volumetric Flask (50 mL)
  14/23 Volumetric Flask (100, 200, 250 mL)
  19/26 Volumetric Flask (500 mL)
  24/29 Volumetric Flask (1000mL)
  29/32 Volumetric Flask (2000mL)
     
 
Comparison
 
While Amber Stoppers are required for light-sensitive reagents, these Clear Stoppers are the standard for general laboratory solutions and visual monitoring of sample levels.

Specifications

  • Material: Clear 3.3 Borosilicate Glass 
  • Drip-Tip: No
  • Joint Size: Select from drop down
  • Head: Penny Head (flat circular grip)
  • Brand: OMSONS
  • Product of India
Safe Autoclaving Guidelines
 
To prevent damage to the stopper or the vessel it is paired with, follow these best practices:
  • Loosen the Joint: Never autoclave a stopper that is firmly seated or "greased" in a joint. Thermal expansion can cause the glass to crack or the stopper to become permanently "frozen" in place.
  • Venting: Ensure there is a path for steam to enter and pressure to equalize. It is often recommended to place a thin strip of paper between the ground glass surfaces or to set the stopper loosely on top of the flask.
  • Standard Cycles: They can typically withstand standard autoclave cycles (e.g., 121°C at 15 psi for 15–20 minutes).
  • Avoid Rapid Cooling: Do not move hot glassware directly into a cold environment or water, as even borosilicate glass can fail under extreme, sudden temperature differentials.

 

Specifications

Material: Borosilicate 3.3 Glass
Taper: Standard Taper 1:10

Delivery

We deliver nationwide across South Africa. Once your order is on its way, you'll receive a tracking link by email so you can follow its progress. If you need your order urgently or you're delivering somewhere hard to reach, contact our team before you check out and we'll help where we can.

Warranty

This product is covered against manufacturing defects in materials and workmanship for 30 days from the date of purchase.

This warranty does not cover: breakage caused by thermal shock (rapid heating or cooling); physical or mechanical damage, including drops, impacts, chips, and cracks from handling; damage from use outside the glassware's rated temperature, pressure, or chemical compatibility; damage from improper cleaning; normal wear such as scratching, staining, or discolouration; or unauthorised repair or modification.

To claim, contact SmartLabs within 30 days of purchase with proof of purchase and a description of the defect.

Our Promise

At SmartLabs, we only stock equipment we'd trust in our own labs and classrooms. If a product arrives faulty or doesn't match its description, let us know and we'll make it right, whether that's a replacement or a refund. Our goal is for every order to work exactly as it should, the first time.