CT (Continuous Thread) metal lids are designed for glass and other rigid containers with compatible continuous-thread neck finishes. The screw-on closure provides secure thread engagement, consistent sealing, and convenient reclosability for products that may be opened and closed multiple times.
These closures are suitable for a wide range of applications, including honey, jams and spreads, sauces, dry foods, coffee, tea, nutritional products, pharmaceutical packaging, personal-care products, and specialty foods. The appropriate liner and closure construction can be selected according to the product, container finish, filling process, and required sealing performance.
Warlter Packaging supplies CT closures in different diameters, materials, liner systems, colours, and printed finishes. Buyers can provide a jar drawing, neck-finish specification, existing lid, or container sample for compatibility review before production.
For related packaging requirements, explore Jar Lids and compatible Glass Jars for a complete container and closure solution.
Key Features
Reliable Sealing Performance
The liner or sealing compound forms the sealing interface between the closure and the container. Different liner systems can be considered according to the packed product, container finish, and filling conditions.
Secure Continuous Thread Design
The continuous-thread design provides stable screw engagement between the closure and a compatible container neck. Correct thread matching is essential for consistent application and sealing performance.
Easy Opening and Reclosing
The screw-on design allows the container to be opened and closed repeatedly, making CT closures suitable for products intended for multiple uses after opening.
Multiple Neck-Finish Options
CT lids are available for common continuous-thread finishes, with customized options available for specific container designs. Compatibility should be confirmed using the actual neck-finish dimensions or a container sample.
Specifications
Item
Specification
Product Type
CT / Continuous Thread Lid
Closure System
Screw-On / Twist-Off
Material
Tinplate / steel / aluminum, depending on design
Common Diameters
38 mm / 43 mm / 53 mm / 63 mm / 70 mm / customized
Neck Finish
Continuous Thread
Typical Finish Examples
38 CT / 70-400 / 70-450 / 70-470
Liner Options
Food-grade liner / sealing compound / customized liner system
BPA Option
BPA-free option available
PVC Option
PVC-free option available
Surface Finish
Plain / lacquered / printed
Available Colours
Gold / silver / white / black / customized
Printing
Custom logo / brand artwork / multi-colour printing
Reclosable
Yes
Testing
Application torque / opening torque / leakage / fit / sealing evaluation
Customization
Size / colour / liner / printing / packaging
Sample Matching
Available based on jar drawing, neck finish, or existing lid sample
Advantages
Convenient Reclosability
The continuous-thread design allows users to open and close the container repeatedly without replacing the closure. This makes CT lids practical for products consumed over several uses.
Flexible Closure Configuration
Different diameters, materials, liner systems, colours, finishes, and printing options allow the closure to be adapted to different packaging projects.
Suitable for Multiple Industries
CT closures can support food, beverage, nutritional, pharmaceutical, personal-care, and specialty packaging where a compatible continuous-thread container is used.
Brand-Focused Decoration
Plain, lacquered, coloured, and printed finishes provide options for brands that want the closure to form part of the overall package appearance.
Support
Established in 2014, Xuzhou Warlter Packaging Products Co., Ltd. is a professional manufacturer of glass packaging solutions and easy-open lid systems. Based in Xuzhou, China, we provide food-grade glass jars, bottles, metal lids, bird’s nest jars, mason jars, carafes, and aluminum cups for global markets.