The 30W20B is a 20mm black unlined industry standard cap. This closure is made of polypropylene and fits our 20-400 bottles and jars. Industry standard caps feature a textured top and ribbed sides. The ribbed-sided design allows for ease of use when removing the lid.


Polypropylene PlasticPolypropylene (PP) is a tough plastic that has good chemical resistance. PP is translucent in its natural state but can have a glossy finish when produced with color. Some examples of common products made with PP are dairy and medication containers. Polypropylene is suitable for hot fill applications of up to 165°F and is therefore great for autoclaving. It is not recommended for cold or sub-freezing temperatures. The Cary Company has an assortment of polypropylene plastics available for purchase, such as plastic caps and jars, which have a higher tolerance for chemical products.


This information has been provided as a general guide. It is the customer's responsibility to select the proper container for product and application compatibility. The Cary Company does hereby disclaim any and all warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular purpose or use. We are not responsible for consequential damages arising from customer's selection and use of containers, container and label dimensions, and/or closures supplied by us.

Additional Information

More Information
Neck Width 20 mm
Neck Finish 20-400
Cap Liner Unlined - No Liner
Liner Compatibility Glass, PE (HDPE, LDPE), PET, PP, PVC, Universal
Color Black
Material PP
Dimensions 0.903" x 0.592" (22.936 x 15.037 mm) - Outside
Case Pack 10,225 ea.
Pallet Pack 357,875 ea. (35 Cases)
Case Weight 26 lbs.
Case Dimensions 20.5" x 13.625" x 12.65"
Q & A
Customer Questions
What are the thread details? NPT, BPS, Metric?
Thank you for your question. This closure is a metric cap that fits 20mm 20-400 neck finishes. You can find additional details about this cap on the product drawing here, or by clicking on the Product Specification link below the product description and then clicking on the Specification Sheet link under the Downloads heading. We further recommend requesting a sample of this closure to test this cap's compatibility with your container. Thank you for choosing The Cary Company.
Can you ship internationally? Where are you located?
The Cary Company online ordering platform is only set up to ship within the United States. For international shipments, please contact us at 630.629.6600 or Sales@thecarycompany.com, and we will be happy to process your order. Our main warehouse and office are located in Addison, Ill. We also have warehouses in across the United States that you can see here. Thank you for choosing The Cary Company.
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