Precision-Molded Vial Stoppers for Consistent Seating, Crimping, and Closure Performance
A stopper that is only a fraction of a millimeter out of specification can create production problems across an entire vial filling line. Difficult insertion, stopper pop-up, inconsistent compression, poor crimp appearance, or excessive puncture force can all originate from the closure interface.
Supply-Packagings supplies grey pharmaceutical butyl rubber stoppers for injection vials, penicillin bottles, diagnostic containers, veterinary products, and other compatible pharmaceutical packaging systems.
The product shown has a broad flange, hollow plug, and molded top features around a central access region. This structure is commonly used in pharmaceutical vial closure systems, although exact application must always be confirmed from the stopper specification and vial geometry.
Key Product Benefits
✚ Bromobutyl and chlorobutyl elastomer options
✚ Hollow plug design for compatible pharmaceutical vial necks
✚ Broad flange provides a controlled sealing and compression interface
✚ Defined central access area for compatible pharmaceutical applications
✚ Multiple dimensions for common crimp-neck vial systems
✚ Standard, siliconized, coated, and project-specific surface options available
✚ Matching pharmaceutical glass vial and aluminum flip-off cap supply
✚ OEM and ODM support for dimensions, materials, treatments, and packing
✚ Factory-direct manufacturer and wholesale supplier for global custom packaging procurement
Product Overview
This product is a molded pharmaceutical rubber stopper intended to be inserted into a compatible crimp-neck glass vial before application of an aluminum closure.
The image demonstrates both top and underside views. Visible design features include:
- A wide circular flange
- A hollow cylindrical lower plug
- A defined central access area
- Radial molded features on the top surface
- Smooth transitional geometry between plug and flange
International buyers may refer to this component as:
- Pharmaceutical rubber stopper
- Grey butyl stopper
- Injection vial stopper
- Penicillin bottle stopper
- Serum vial stopper
- Hollow plug vial stopper
- Pharmaceutical elastomeric closure
How the Stopper Works in a Pharmaceutical Vial System
Stopper Placement
After filling according to the validated production process, the stopper plug enters the vial opening while the flange remains above the neck.
Controlled Seating
Correct dimensional interference between the stopper and vial helps achieve stable positioning before crimping.
Aluminum Closure Application
An aluminum crimp seal or aluminum-plastic flip-off cap is installed over the stopper and mechanically formed beneath the vial flange.
Final Closure Assembly
The vial, elastomeric stopper, and aluminum closure work together as a system. Performance cannot be reliably determined from the stopper alone.
Why Stopper and Vial Tolerances Matter
Insertion Force Is Too High
An oversized plug, small vial bore, high-friction surface, or unsuitable elastomer may make stoppering difficult and reduce line efficiency.
Stopper Fits Too Loosely
Insufficient engagement may lead to unstable handling before the aluminum closure is applied.
Stopper Pops Up
Elastic recovery, vial geometry, plug dimensions, stoppering force, and process conditions can contribute to pop-up behavior.
Crimp Closure Looks Uneven
Stopper flange thickness forms part of the complete closure stack height. Excessive variation can affect crimp adjustment and final appearance.
Access Performance Is Inconsistent
Puncture behavior depends on elastomer composition, stopper thickness, surface treatment, device or needle specification, and actual use conditions. Appropriate functional testing is required during qualification.
Structural Features
Broad Circular Flange
The flange provides the primary top sealing surface and is compressed between the vial lip and aluminum closure.
Hollow Plug Structure
The hollow lower portion enters the vial neck and helps position the stopper while reducing unnecessary central material.
Central Access Zone
The stopper has a visually defined center that can help identify the intended access area in compatible applications.
Radial Molded Features
The visible top markings can support design identification and molding geometry. Their precise function depends on the specific stopper model.
Material Options
Bromobutyl Rubber
Bromobutyl elastomers are frequently selected for pharmaceutical closures because of their low permeability and useful chemical resistance characteristics.
Chlorobutyl Rubber
Chlorobutyl is another widely used halobutyl elastomer for pharmaceutical vial closure applications.
Surface Modification
Depending on the product and process requirements, options may include:
- Siliconization
- Polymer coating
- Reduced-friction treatments
- Specialized barrier coating
Material and surface configuration should be selected through compatibility, extractables and leachables, processing, and stability evaluation.
Technical Specifications
| Parameter | Available Options |
|---|---|
| Product Type | Pharmaceutical butyl rubber vial stopper |
| Material | Bromobutyl / chlorobutyl |
| Standard Color | Grey |
| Structure | Circular flange + hollow plug |
| Common Sizes | 13mm / 20mm and additional specifications |
| Surface | Standard, siliconized, coated options |
| Compatible Container | Pharmaceutical glass vial / penicillin bottle |
| Compatible Closure | Aluminum crimp cap / aluminum-plastic flip-off cap |
| Applications | Pharmaceutical, diagnostic, veterinary, laboratory |
| OEM Options | Existing specifications and project-specific treatments |
| ODM Options | Custom geometry subject to technical evaluation |
| MOQ | Depends on material, size, treatment, and packing |
| Sampling | Available for selected standard specifications |
| Packing | Sealed clean bags + reinforced cartons |
| Shipping | Sea, air, express |
| Trade Terms | FOB, CIF, DDP depending on destination |
Final dimensions, elastomer formulation, cleanliness, sterilization status, coatings, testing requirements, and regulatory documentation should be agreed for every pharmaceutical project.
Matched Closure System Options
Clear Pharmaceutical Glass Vials
Suitable where product visibility is required for inspection or presentation.
Amber Pharmaceutical Glass Vials
Available for products whose stability strategy requires additional light protection.
Aluminum Crimp Seals
Standard aluminum seals mechanically secure the stopper onto a compatible vial.
Flip-Off Caps
Colored aluminum-plastic flip-off closures provide convenient access and make visual SKU coding easier.
Secondary Packaging
Custom cartons, trays, dividers, and labels can be supplied for individual vials or multi-vial kits.
Applicable Industries
💉 Pharmaceutical Containers — compatible liquid, powder, and injectable vial systems
🧪 Biotechnology — research materials, biological products, and professional laboratory preparations
🔬 Diagnostics — reagents, control materials, calibrators, and compatible diagnostic packaging
🐾 Veterinary Pharmaceuticals — vial-based veterinary product packaging
🏥 Contract Filling — vial filling, stoppering, crimping, and secondary packaging facilities
🧴 Professional Cosmetic Packaging — selected clinical-style products using pharmaceutical vial systems
Application Scenarios
◆ Penicillin bottle closure systems
◆ Injection vial stoppering lines
◆ Diagnostic reagent packaging
◆ Pharmaceutical powder and liquid vials
◆ Veterinary healthcare packaging
◆ Multi-vial hospital and clinical kits
◆ Export programs sourcing vial, stopper, cap, and carton as one system
Product Advantages
System-Level Compatibility
A stopper must match the vial neck and aluminum closure. Coordinated sourcing reduces the dimensional interfaces buyers need to manage and can shorten packaging qualification.
Multiple Material and Surface Choices
Bromobutyl, chlorobutyl, siliconized, and coated variants give technical teams options for different formulations and processing requirements.
OEM and ODM Capability
OEM programs can use established specifications with customized treatments and packing. ODM programs can evaluate project-specific structures when commercial volume supports tooling and qualification.
Stable Repeat Wholesale Supply
Critical dimensions, material specifications, surface requirements, and packing standards can be maintained against the approved purchasing specification.
One Supplier for Multiple Packaging Categories
Supply-Packagings supports pharmaceutical bottle and vial systems as well as jar, pouch, supplement packaging, aluminum closures, liners, and paper cartons for consolidated custom packaging procurement.
Quality Control
Project-specific inspection can include:
◇ Flange diameter and thickness verification
◇ Plug outer and inner diameter checks
◇ Overall stopper height
◇ Molded surface and visual inspection
◇ Surface treatment verification
◇ Fit testing against approved vial samples
◇ Stopper and aluminum closure stack-height evaluation
◇ Packing cleanliness verification
◇ Lot identification and traceability
For pharmaceutical use, the final container-closure system should be qualified according to the drug product, filling conditions, processing method, sterilization strategy, storage requirements, and applicable regulatory standards.
Packaging and Logistics
Clean Component Packing
Stoppers can be packed in sealed inner bags with batch identification and reinforced export cartons. Packing format can be adjusted according to the buyer’s downstream washing, sterilization, filling, and stoppering process.
Sterility, ready-to-use status, or ready-to-sterilize status must be explicitly confirmed in the agreed specification.
Global Logistics
Sea freight is suitable for large wholesale orders. Air freight can support urgent production requirements, while express courier is recommended for samples and qualification quantities. DDP options can be evaluated for selected markets.
Frequently Asked Questions
Q1. What type of stopper is shown in the image?
It appears to be a grey pharmaceutical rubber vial stopper with a circular flange and hollow plug. Exact use should be confirmed from dimensions and technical documentation.
Q2. Can it be used with penicillin bottles?
It can be matched to compatible penicillin vial formats. The vial neck, stopper, and aluminum seal specifications must be checked together.
Q3. Do you offer bromobutyl and chlorobutyl materials?
Yes. Material selection depends on formulation, process requirements, and pharmaceutical qualification.
Q4. Are 13mm and 20mm sizes available?
Yes. These are common vial closure dimensions, and additional specifications can be evaluated.
Q5. Can you provide matching aluminum flip-off caps?
Yes. Multiple flip-off cap sizes and colors can be coordinated.
Q6. Can you provide glass vials as well?
Yes. Clear and amber pharmaceutical glass vials are available for matched packaging projects.
Q7. Are these stoppers sterile?
Supply condition depends on the project. Sterility should never be assumed and must be specifically defined in the purchasing requirements.
Q8. Can you develop custom stopper dimensions?
Yes, special specifications can be evaluated through an ODM project when technical and volume requirements justify development.
Buyer Feedback
★★★★★ More stable stoppering in our production trials
“The stopper dimensions matched our vial better than the previous product, which reduced insertion variation.”
— Packaging Engineer, Pharmaceutical Contract Manufacturer
★★★★★ Matched components simplified sourcing
“Using the same supplier for our vial, stopper, and flip-off cap reduced repeated compatibility discussions.”
— Procurement Manager, Diagnostic Products Company
★★★★★ Consistent dimensions on repeat shipments
“The flange and plug measurements stayed within our approved specification, which helped us maintain line settings.”
— Operations Lead, Healthcare Packaging Company
Related Product Categories
- Pharmaceutical Rubber Stoppers
- Injection Vial Stoppers
- Bromobutyl Stoppers
- Chlorobutyl Stoppers
- Lyophilization Stoppers
- Pharmaceutical Glass Vials
- Penicillin Bottles
- Aluminum Flip-Off Caps
- Aluminum Crimp Seals
- Pharmaceutical Containers
- Bottle Packaging
- Supplement Packaging
- Jar Packaging
- Flexible Packaging
- Pharmaceutical Folding Cartons
- Custom Packaging Services
Visit our products page for complete packaging development support.
Request a Matched Stopper Sample for Your Vial
Provide your vial neck diameter, vial drawing or physical sample, current stopper dimensions if available, intended product category, preferred elastomer specification, required annual quantity, and destination market. Sending the existing vial, stopper, and aluminum closure together is the fastest route when your exact technical dimensions are unknown.
Supply-Packagings provides OEM, ODM, factory-direct manufacturing and wholesale custom packaging support for pharmaceutical stoppers, glass vials, bottle systems, flip-off caps, jar packaging, pouch packaging, and secondary cartons.
For compatibility evaluation, technical samples, MOQ, production lead time, and global shipping options, Contact Us.
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