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  3. KIMBLE 850400-2425

KIMBLE Hex Head Hollow Glass Stopper 850400-2425. 24/25

850400-2425 Kimble # 850400-2425. Medium Length Hex Head Hollow Glass Stopper 24/25

( Brand: Kimble ), ( Manufacturer Part Number: 850400-2425 ), ( Part Type: Head Stopper ), ( Country Of Origin: United States ), ( Unit Type: Unit ), ( Intended Use/discipline: Biological Laboratory, Medical Laboratory, Microbiological Laboratory )

Review KIMBLE 850400-2425. Medium Length Hex Head Hollow Glass Stopper 24/25

The **Kimble 850400-2425 Hex Head Hollow Glass Stopper** is a precision-engineered laboratory component designed for high-performance applications requiring both durability and versatility. Crafted from borosilicate glass (Type I), this stopper features a robust hex head with a smooth, machined finish that ensures a secure, leak-proof seal when paired with compatible glassware, such as reagent bottles, volumetric flasks, or other laboratory containers. The hollow design allows for easy insertion and removal, reducing the risk of breakage or damage to the stopper s delicate threads, while the hex head provides a firm grip for manual handling ideal for environments where ergonomics and reliability are critical.

Measuring **24/25** in size, this stopper is engineered to fit standard laboratory glassware with a 24/25 neck diameter, offering a snug yet adjustable fit that minimizes the potential for contamination or spillage. The internal hollow core not only facilitates easier placement but also reduces the risk of glass shards if the stopper should ever fracture under stress. The stopper s smooth, polished surface resists chemical corrosion and ensures compatibility with a wide range of solvents, acids, and bases, making it suitable for both routine laboratory procedures and demanding research applications.

Beyond its functional benefits, the Kimble 850400-2425 is built to meet stringent industry standards, including compliance with **ASTM E438** and **USP/NF** specifications, ensuring consistency in performance and safety. Its borosilicate glass composition provides exceptional thermal resistance, capable of withstanding repeated heating and cooling cycles without warping or compromising structural integrity. Whether used in analytical chemistry, pharmaceutical development, or educational settings, this stopper delivers a balance of precision, durability, and ease of use, making it an indispensable component for any laboratory requiring reliable, high-quality glassware accessories.

### **Pros and Cons of buying a Kimble 850400-2425 Hex Head Hollow Glass Stopper (24/25)**

#### **Pros:**

1. **High-Quality Glass Construction** Kimble is a trusted brand known for durable, chemically resistant glassware, making this stopper suitable for laboratory and industrial applications where reliability is critical.

2. **Precision Fit** The 24/25 size ensures a secure seal in standard laboratory glassware, reducing the risk of leaks or contamination.

3. **Hollow Design** The hollow interior allows for easy cleaning and prevents residue buildup, which is beneficial in applications requiring frequent sterilization or repeated use.

4. **Hex Head for Easy Handling** The hexagonal shape provides a secure grip, making it easier to insert and remove compared to smooth stoppers.

5. **Compatibility with Autoclaving** Glass stoppers like this are typically autoclavable, making them ideal for sterile laboratory environments.

6. **Chemical Resistance** Glass is inert to most chemicals, reducing the risk of degradation or leaching, which is important in analytical and pharmaceutical settings.

7. **Long Lifespan** Properly maintained glass stoppers can last for years, making them a cost-effective choice for frequent use.

#### **Cons:**

1. **Fragility** Glass is prone to breakage if dropped or mishandled, which could lead to costly replacements or lab downtime.

2. **Limited Temperature Range** While glass can handle high temperatures, extreme thermal shocks (e.g., rapid heating or cooling) may cause cracking.

3. **Weight** Glass stoppers are heavier than plastic alternatives, which could be inconvenient for users who frequently handle them.

4. **Maintenance Requirements** Glass must be cleaned carefully to avoid scratches or damage, and improper handling (e.g., using abrasive cleaners) can shorten its lifespan.

5. **Cost** Compared to plastic or rubber stoppers, high-quality glass stoppers are more expensive upfront.

6. **Potential for Contamination** If not properly cleaned or if debris enters the hollow interior, it could introduce contaminants into the system.

7. **Limited Flexibility** Unlike silicone or rubber stoppers, glass does not conform to irregular shapes, which may be a limitation in some applications.

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### **Conclusion and Recommendation**

The **Kimble 850400-2425 hex head hollow glass stopper** is an excellent choice for **laboratory, pharmaceutical, or industrial applications** where **durability, chemical resistance, and sterility** are priorities. Its precision fit, ease of cleaning, and compatibility with autoclaving make it ideal for environments requiring high standards of hygiene and reliability.

However, if **fragility, weight, or cost** are significant concerns, alternatives like **high-quality plastic or silicone stoppers** (if chemically compatible) might be worth considering. For most **serious laboratory or analytical work**, the benefits of glass outweigh the drawbacks, making this stopper a **strong recommendation** for long-term use.

**Final Recommendation:**

Purchase the **Kimble 850400-2425** if you need a **durable, chemically resistant, and autoclavable** stopper for **high-precision applications**. If budget or handling concerns are major factors, evaluate whether a **reinforced plastic or silicone alternative** could suffice. Always ensure proper storage and handling to maximize its lifespan.

Details:

Specifications Joint Size mm 24/25, Stopper Middlebrow 3.3. Manufactured from 33 expansion, low ex tractable brisket glass conforming to USP Type I and ASTM E438, I, Class A requirements. May be set on the flattened top to avoid contamination of ground surface. Hollow, hexagonal head medium length Standard Taper stopper that is easily gripped.

part #: 8504002425 price

  • $38.00

specifications plasticwarelabsuppy:

  • brand: Kimble
  • mpn: 850400-2425
  • part type: Head Stopper
  • country of origin: United States
  • unit type: Unit
  • intended use/discipline: Biological Laboratory, Medical Laboratory, Microbiological Laboratory

seller plasticwarelabsuppy:

  • city: San Diego, California
  • # reviews: 37
  • rating: 100.0%

offer plasticwarelabsuppy:

  • availability: In Stock
  • started: March 3, 2026
  • options: Ship-to-home
  • sold: 0
  • quantity: 1

returns plasticwarelabsuppy:

  • policy: No Returns

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  • credit card: Mastercard
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shipping plasticwarelabsuppy:

  • cost: $0.00
  • class: Standard
  • carrier: USPS
  • service: USPS Ground Advantage
  • transit: 3-9 Days
  • type: Calculated

general plasticwarelabsuppy:

  • Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware
  • condition: Used
part type: head stopper, country of origin: united states, unit type: unit, intended use/discipline: biological laboratory, medical laboratory, microbiological laboratory,
category: business & industrial > medical, lab dental supplies > glassware plasticware > medical lab glassware, sku: 13381838215537604,
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1 offer $38.00 USD
  • Used. Offer #1 priced at $38.00 + $0.00 shipping estimate = $38.00* total. Joint Size (mm) 24/25. Stopper Material Boro 3.3.FREE SHIPPING

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