This 38mm (38-400) white ribbed (matte top) vented plastic cap features a vented two-piece, pulp-backed heat induction liner compatible with HDPE and LDPE containers. Vented closures are a cost-effective, sustainable solution to help prevent bloating, paneling and leaking as well as extend product shelf life. This cap has a B-Style vent which is suitable for less aggressive formulas combining great value, performance and sufficient venting for a variety of applications. The foil liner offers a tamper-evident seal.

Key Benefits:

  • Ribbed sides for easy grip
  • Compatible with HPDE & LDPE containers
  • Hydrophobic & oleophobic (oil-repelling) membrane
  • Sustainable, economic & efficient pressure relief
  • Best vent for less aggressive formulas (ie, bleach, dry goods/powders)
  • Good airflow
  • No pierce/no glue
  • Tamper evident
  • Helps prevent bloating, paneling & leaking
  • Helps extend a product's shelf life
  • Proudly Made in the USA

Membrane Specifications:

  • Membrane Material: Oleophobic ePTFE, 0.2-Micron membrane
  • Membrane Style: B-Vent
  • Membrane Thickness: 6 - 10 mils
  • Oleophobicity Rating: 8 (0 to 8: 8 is the most repellent)
  • Airflow 0.18 ml/min @ 125pa
  • Water Entry Pressure (WEP): > 90 psi
  • Vent Patch Diameter: 0.25" (+/- 0.020")
  • Vent Holes Through Liner


Polypropylene PlasticPolypropylene (PP) is a tough plastic that has excellent 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 Width38 mm
Neck Finish38-400
Cap LinerVented 0.20" Pulp FSM-1 Two Piece Induction Foil Liner, Tamper Evident for HDPE/LDPE Containers w/Oleophobic ePTFE, 0.2-Micron Membrane
Liner CompatibilityPE (HDPE, LDPE)
Sealing CharacteristicsTamper Indicating
Dimensions1.595" Dia. x 0.440" H
Case Pack2,900 ea.
Pallet Pack101,500 ea. (35 Cases)
Case Dimensions24" L x 16" W x 11" H
Pallet Dimensions48" L x 40" W x 90" H
IndustriesHealth & Beauty, Household Chemicals, Nutraceuticals, Pharmaceutical
Country of ManufactureUnited States
Note:Vented caps can be specific to application. We recommend requesting a sample of this cap to test compatibility with your application.
Q & A
Customer Questions
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.
Which styles do continuous threaded caps come in?
CT caps come in smooth top/smooth side, smooth top/ribbed side, matte top/ribbed side, and vented styles.
What’s the benefit of using this continuous threaded cap?
CT caps are widely used across industries due to its sleek look, great grip and easy use when opening and closing. Its wide surface allows for an ideal platform for labeling.
What type of containers are often paired with continuous threaded caps?
Continuous threaded caps can be used with various industries and numerous sized containers anywhere from small glass vials to industrial F-style containers. Compatible containers are listed (though not limited to) under the related items section of the product page.
How do the vents on these caps work?
Once the liner is adhered to the bottle, the small vent in the liner allows for gases to filter out underneath the cap
What is the benefit to a vented cap as opposed to a cap with a standard liner?
The vent helps the container to "breathe" while also preventing bloating, paneling, and leaking. Without a "vent", heat induction liners provide an airtight seal.
What type of applications are recommended with vented caps?
It is recommended to be used with less aggressive formulas such as bleach, dry goods, or powders. If you are not sure if this is the right cap for you, you are welcome to request a sample. This form can be found here
Is it possible to still experiencing bloating/paneling or leaking after using a “vented” liner?
Yes, it is possible. It may that your bottle needs to be fluorinated. Reach out to our sales team for more information. Click here for more details on Fluorination.
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