The 61mm thread is a robust screw thread commonly found on tight-head containers in North America, particularly those used for hazardous materials. Containers with this thread type are often UN- or DOT-rated, meeting strict regulatory standards for the safe storage and transportation of chemicals, solvents, and other dangerous goods.

The wider thread design ensures a secure, leak-proof seal, while accommodating advanced cap options such as tamper-evident closures or vented plugs for pressure management. This makes the 61mm thread a trusted choice for industries requiring compliance, durability, and reliable performance under demanding conditions.