With one of the widest openings in the Nalgene brand, the 100-415 thread is a standard closure size commonly found on laboratory containers, particularly large-volume bottles and carboys. The designation “100-415” refers to a 100mm outer diameter with a 415 neck finish, defining the thread style and dimensions.

This wide-mouth design allows for convenient filling, pouring, and cleaning, making it ideal for handling bulk materials or maintaining sterile conditions in laboratory environments. The 100-415 thread’s large opening also supports better airflow during dispensing, reducing the risk of splashing or spills, and is frequently chosen for applications requiring easy access to container contents.