The 28-400 Polypropylene Continuous Thread Cap is a versatile, industry-standard screw closure designed to fit a wide range of plastic and glass bottles with a 400-series neck finish. Made from durable polypropylene in Canada, this 28mm cap features a smooth top and fine ribbed sides for comfortable grip and consistent torque — making it a reliable choice for food, beverage, pharmaceutical, cleaning product, and personal care applications.

Its flat seal provides a secure fit straight out of the box. For enhanced leak protection or tamper evidence, this cap is fully compatible with our range of cap liners, including PE foam, 3-ply foam, pressure seal, and heat induction seal options. Available in bulk quantities, it is ideal for manufacturers, co-packers, and private label operations of any size.