The 38-400 Polypropylene Continuous Thread Cap is a popular mid-size closure widely used in food, household chemical, personal care, and agricultural packaging. With a 38mm diameter and 400-series neck finish, this cap fits a broad selection of standard plastic and glass containers. Manufactured in Canada from durable polypropylene, it features a smooth top profile and fine ribbed sides for a confident, non-slip grip.

The flat seal provides reliable closure performance, and the cap is compatible with our full range of liners — making it easy to upgrade the seal for liquid-sensitive or tamper-evident applications. Available in high-volume case quantities, this closure is a dependable option for production lines that demand consistent quality and short lead times.