You arrive holding a cap and needing the finish that takes it. Two facts narrow your search quickly: the diameter stamped on your closure, and what kind of closure it is.
Filter the Finish Families
Showing all 14 finish families.
| Finish | Diameter | Closure | Where you meet it |
|---|---|---|---|
| Continuous thread 400 One thread turn, the shallowest family your cap can take. | 18–120 mm | Screw cap | Jars, sauces, cosmetics |
| Continuous thread 410 Your diameter matches 400; the neck is taller and carries more thread. | 18–38 mm | Screw cap | Bottles needing a taller seal |
| Continuous thread 415 Taller again than 410 on the same diameter. | 18–28 mm | Screw cap | Tall narrow necks |
| 24-410 The default beauty pump finish on your lotion bottles. | 24 mm | Pump or screw cap | Lotions, soaps, serums |
| 28-400 Shorter neck than 28-410, and your caps are not interchangeable. | 28 mm | Screw cap or trigger | Sauces, household |
| 38-400 Wide mouth for your pouring and your filling speed. | 38 mm | Screw cap, tamper band | Dairy, juice, supplements |
| 43-485 Shallow thread built for a sifter fitment. | 43 mm | Spice cap, sifter | Spice jars |
| Dropper 18-400 Pairs with a bulb or screw plunger pipette. | 18 mm | Pipette dropper | Tinctures, essential oils |
| DIN 18 European counterpart to the 18-400 dropper. | 18 mm | Dropper, screw cap | Pharma and beauty in Europe |
| Lug twist-off Lugs engage a formed lid, and your vacuum makes the seal. | 38–110 mm | Twist-off lid | Preserves, vacuum packs |
| Crown 26H180 Crimped rather than threaded, and the standard for your beverages. | 26 mm | Crown cap | Beer and carbonated drinks |
| BVS 30x60 An aluminium cap rolled onto your thread after filling. | 30 mm | ROPP screw cap | Wine and spirits |
| Bar top cork Sized to the cork rather than to a thread standard. | 18.5–21.5 mm | Cork stopper | Spirits |
| Swing top clip A gasket seals against a formed lip, no thread at all. | Formed lip | Ceramic or steel clip | Beer, oils, storage |
How to Read a Designation
A finish like 28-410 carries two facts for you. The 28 is your diameter in millimetres across the thread, and the 410 is the thread series, which sets your neck height and your thread profile.
That second number is where your project goes wrong. A 28-400 and a 28-410 share a diameter, so your cap threads onto either and only seals properly on the one it was designed for.
Where Diameter Alone Is Not Enough
Your lug and twist-off finishes are named by diameter and formed lugs rather than by a thread series. Crown finishes are crimped rather than threaded, and swing tops seal a gasket against a formed lip with no thread at all.
Those families need the drawing rather than a designation. SGSBOTTLE issues the finish drawing with tolerances for glass from 14 lines in Shandong and Xuzhou, so your closure supplier works from dimensions.
The designation names a family; the drawing names your bottle. SGSBOTTLE gauges finishes on 14 lines.
Why a Cap That Fits Can Still Leak
Your seal is made by the liner deforming against the sealing surface, not by the thread. A cap on the wrong series seats the liner at the wrong height, so the clamping force lands in the wrong place.
The symptoms look like other problems. Leaks, lost vacuum on a 330 ml (11 oz) jar, and removal torque that drifts across a run all point back at a mismatch nobody has checked.
What to Send Us When the Table Does Not Answer
Send your cap and your bottle together where you can, or your closure drawing where you cannot. A measurement of both settles your designation faster than any description.
SGSBOTTLE quality engineers in Shandong identify the finish and return the drawing with the tolerances your capping head needs.
What Goes on Your Enquiry
Your closure with its diameter and series if you know it, your liner, the format in ml and oz, and your filling and capping equipment. SGSBOTTLE comes back with the matching finish, the drawing and bottles for a capping trial.