Glossary · Manufacturing
What Is Neck Finish?
A neck finish is the opening at the top of a bottle or jar, defined by its diameter in millimetres together with its thread standard — a 24/410 neck is a 24 mm opening on a 410 thread. The neck finish determines which caps, pumps, droppers and sprayers will actually fit the container.
Why it matters when you source
A mismatched neck finish means the closure will not seal, and it is a common cause of late-stage packaging failure. Confirm the neck finish on both the bottle and the closure specification before sampling, not after the caps have been moulded.
Continue reading
Related terms
Sourcing a Product in This Category?
Send your product brief — quotation and formula recommendations within 24 hours.
Get a Free Quote