The 83B buttress thread is a durable and practical design found on many Nalgene laboratory containers, particularly larger carboys and wide-mouth bottles. This thread type is engineered for a secure, leak-proof seal, making it suitable for storing and dispensing liquids in lab settings. The wide 83mm opening allows for easy filling, cleaning, and access to contents, even when working with bulky instruments or large samples. Its robust buttress thread design ensures consistent performance during repeated use, while maintaining compatibility with specialized closures, including spigots and tamper-evident caps. The 83B thread is valued for its reliability in both routine and demanding lab applications.

The 83B caps provided here are also compatible with Foxx Life Sciences™ and Kautex® brands of the same thread type.