UNITED SCIENTIFIC SUPPLIES INC UNSGS16 Stopper Bdia 840287247824

( Brand: United Scientific Supplies Inc ), ( Manufacturer Part Number: UNSGS16 ), ( Country Of Origin: In ), ( Material: Borosilicate Glass ), ( Color: Clear ), ( Type: Lab Supplies Consumables Labware Lab Caps, Plugs Dispense ), ( Weight: 0.1000 ), ( Length: 3.000 ), ( Width: 2.000 ), ( Features: Solid Penny Head Glass Stoppers Have An Interchangeable Ground Jo ), ( Battery Included: No ), ( UPC: 840287247824 )

Review UNITED SCIENTIFIC SUPPLIES INC Stopper Sz Bdia Clear

The **United Scientific UN-SGS16 Stopper** is a high-quality, precision-engineered glass stopper designed for laboratory and educational applications, offering both reliability and versatility for a wide range of scientific experiments and storage needs. Crafted from durable **borosilicate glass (Type I, Class A)**, this stopper is engineered to withstand extreme temperatures, chemical resistance, and mechanical stress, making it ideal for use in chemistry labs, biology classrooms, or any setting requiring a dependable sealing solution. With a **16 mm diameter** and a **15 mm bore diameter**, this stopper is specifically sized to fit snugly into standard 16 mm glassware, such as reagent bottles, volumetric flasks, or test tubes, ensuring an airtight and leak-proof seal when properly inserted. The stopper s smooth, polished surface minimizes friction during insertion and removal, reducing the risk of breakage or contamination, while its uniform thickness and symmetrical design promote consistent performance across multiple uses. Whether used to preserve liquids, prevent evaporation, or maintain sterile conditions in experiments, this stopper delivers a balance of durability and precision, making it a trusted component in both academic and professional laboratory settings. Its clear, transparent construction also allows for easy visual inspection of contents without compromising functionality, further enhancing its utility in educational demonstrations and routine lab procedures.

### **Pros and Cons of buying a United Scientific UNSG16 Stopper (Size 16, 15 mm Bore Diameter)**

1. **High-Quality Construction** United Scientific is a reputable brand known for producing durable and well-engineered laboratory glassware. The UNSG16 stopper is designed to fit securely in standard 15 mm bore diameter glassware, ensuring a tight seal when properly lubricated.

2. **Compatibility with Standard Glassware** The stopper is designed to fit common laboratory glassware, such as volumetric flasks, beakers, and other containers with a 15 mm bore diameter. This makes it versatile for various lab applications.

3. **Smooth and Even Fit** The stopper s design allows for a snug, leak-proof seal when used with the correct lubricant (e.g., silicone grease or Vaseline). This is essential for experiments requiring controlled environments, such as distillation or storage of volatile liquids.

4. **Cost-Effective for Basic Use** Compared to high-end laboratory stoppers, this stopper offers a reasonable balance between affordability and functionality for general lab work.

5. **Easy to Clean and Sterilize** Glass stoppers can be cleaned with laboratory detergents and sterilized using autoclaving or baking, making them reusable and hygienic for repeated use.

6. **Durability** High-quality borosilicate glass (likely used in this stopper) is resistant to thermal shock and chemical corrosion, ensuring longevity with proper care.

7. **Standardized Size** The 16 mm size is a common laboratory standard, making it easy to find replacements or compatible accessories if needed.

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1. **Requires Proper Lubrication** Without the correct lubricant (e.g., silicone grease), the stopper may not seal properly, leading to leaks or contamination. Improper lubrication can also make it difficult to insert or remove.

2. **Potential for Breakage** Glass stoppers are fragile and can shatter if dropped or subjected to thermal stress (e.g., rapid temperature changes). This poses a risk of injury and contamination if mishandled.

3. **Limited to Specific Applications** While versatile, this stopper is not suitable for high-pressure or high-vacuum systems, which require specialized stoppers (e.g., ground-glass joints with better sealing mechanisms).

4. **Maintenance Required** Over time, lubricants can degrade or dry out, requiring reapplication. Additionally, the stopper may accumulate residue from experiments, necessitating frequent cleaning.

5. **Not Ideal for Extreme Conditions** If exposed to highly corrosive chemicals (e.g., strong acids or alkalis) or extreme temperatures, the stopper may degrade or become damaged.

6. **Potential for Contamination** If not cleaned thoroughly between uses, residues from previous experiments can remain, affecting the accuracy of subsequent procedures.

7. **Replacement Costs** While affordable initially, frequent breakage or wear may require purchasing additional stoppers, adding to long-term costs.

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The **United Scientific UNSG16 Stopper (Size 16, 15 mm Bore Diameter)** is a practical and cost-effective choice for general laboratory use, particularly in settings where a reliable, standard-sized stopper is needed for basic experiments. Its durability, compatibility with common glassware, and ease of cleaning make it a solid option for educational or small-scale research labs. However, its fragility, dependence on proper lubrication, and limitations in extreme conditions mean it may not be suitable for high-precision or industrial applications.

- **Buy it if:** You need a basic, affordable stopper for general lab work (e.g., chemistry experiments, storage of liquids, or simple distillation). It is ideal for educational settings, home labs, or small-scale research where cost and compatibility are priorities.

- **Avoid it if:** You require stoppers for high-pressure, high-vacuum, or extreme-temperature applications. In such cases, consider specialized stoppers (e.g., ground-glass joints with PTFE seals) or more robust materials like Teflon.

- **Consider alternatives if:** You frequently work with highly corrosive substances or need stoppers that are more resistant to breakage (e.g., plastic or ceramic stoppers).

For most standard laboratory needs, this stopper provides a good balance of functionality and affordability, provided it is handled with care and proper lubrication. Always follow safety protocols when working with glassware to minimize risks.

Details:

For use with ground jointed glassware such as flasks and separator funnels. Light Industrial. Receptacles.

part #: unsgs16 price

• $10.75

specifications plasticwarelabsuppy:

• brand: United Scientific Supplies Inc
• mpn: Unsgs16
• country of origin: In
• material: Borosilicate Glass
• color: Clear
• type: Lab Supplies Consumables Labware Lab Caps, Plugs Dispense
• weight: 0.1000
• length: 3.000
• width: 2.000
• features: Solid Penny Head Glass Stoppers Have An Interchangeable Ground Jo
• battery included: No
• upc: 840287247824

seller plasticwarelabsuppy:

• # reviews: 1319821
• rating: 99.8%
• city: USA

offer plasticwarelabsuppy:

• options: Ship-to-home
• started: February 9, 2026
• sold: 0
• availability: In Stock

general plasticwarelabsuppy:

• Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware
• condition: New

payments plasticwarelabsuppy:

• wallet: Paypal
• credit card: Discover
• other

shipping plasticwarelabsuppy:

• class: Standard
• service: Standard
• type: Fixed
• cost: $5.00
• transit: 3-3 Days

returns plasticwarelabsuppy:

• paid by: Seller
• time: 60 Days
• policy: Returns Accepted
• method: Money back

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