A 28 mm neck diameter with a 410 thread standard — the most common size for lotion pumps and triggers on 200 ml and larger bottles.
Decoding the 28/410 notation
A neck finish like 28/410 packs two numbers. The 28 is the outer thread diameter in millimetres; the 410 is the thread style from the SPI (Society of the Plastics Industry) classification, which defines the thread pitch and profile. So 28/410 means “28 mm neck, 410 thread” — the most common size for lotion pumps, treatment pumps and trigger sprayers on 200 ml and larger bottles.
Other sizes you’ll meet: 18/410 and 20/410 for serums and small droppers, 24/410 for mid-size lotions, and 33/400 or 38/400 for large trigger and cleaning bottles.
Why matching the neck finish matters
The neck finish must match the closure’s thread exactly or the cap will leak or cross-thread. When you source a bottle and a pump from different suppliers, confirm both use the same finish — a “410” thread from one maker should match another, but tolerance differences still happen, so always test a physical sample.
| Neck finish | Typical use |
|---|---|
| 18/410 & 20/410 | Serums, droppers, small lotions |
| 24/410 | Lotions, mid-size pumps |
| 28/410 | Lotion pumps, triggers (200 ml+) |
| 33/400 & 38/400 | Trigger sprayers, large cleaning bottles |
Quick answer
A 28 mm neck diameter with a 410 thread standard — the most common size for lotion pumps and triggers on 200 ml and larger bottles.
Related: cosmetic bottles.
Compliance note: Shijin is ISO 9001:2015 certified and supplies the compliance documents your market requires — including FDA and EU 10/2011 certificates on request — so your order clears customs and retailer audits.
Frequently Asked Questions
What does 28/410 neck finish mean?
A 28 mm neck diameter with a 410 thread standard — the most common size for lotion pumps and triggers on 200 ml and larger bottles.
What is the difference between 28/410 and 28/400?
The diameter (28 mm) is the same, but the thread profile differs: 410 is a taller, finer thread used for pumps and dispensers, while 400 is a shorter thread common on continuous-thread caps.
Can I put any 28/410 pump on any 28/410 bottle?
Usually, but always test a physical sample — manufacturing tolerances between suppliers can still cause a loose or tight fit.
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