The Ultimate Guide to Perfume Bottle Neck Finishes (FEA Standards Explained)

A neck finish is the standardized glass opening at the top of a perfume bottle: outer diameter, sealing bead, neck height and bore. It decides which pump ferrule, collar and cap can seal the bottle. Specify it wrong and you get leaks, tilted actuators and closures that never seat on the line.

Locking it down before freezing the bottle drawing avoids the costliest failure in fragrance packaging: thousands of units that cannot be closed. This guide covers the FEA sizes, the standards behind them, tolerances, closure choices and testing.

What a neck finish actually measures

It is a cluster of dimensions, each controlling one behaviour in assembly. EN 14854 labels them with symbols; these are the ones worth knowing:

Two drawings that both say "FEA 15" can differ enough to fail assembly. Ask for a dimensional report, not just a size label.

The FEA size family: 13, 15, 18 and 20

Finishes are named for nominal neck diameter in millimetres. You may also see 13/400 or 15/400 — the second number is a finish-height code from an older convention, not millimetres.

FEA 15 dominates because its collar supply chain is the deepest, keeping every downstream option open. Drop to 13 only when the bottle really is tiny; step up to 18 or 20 when you need more product per press.

Where the standard lives: EN 14854 and EN 14849

"FEA" is trade shorthand. The written specification is EN 14854, Glass packaging — neck finishes for aerosol and spray glass containers (CEN/TC 261). Its 2021 revision covers moulded and tubular glass at nominal FEA 11, 13, 15, 17, 18 and 20, read together with EN 14849, which fixes the ferrule dimensions that close onto those finishes. CETIE guides cover crimping practice and test methods. Naming them turns "please make sure it fits" into measurable conformity.

Realistic tolerances: glass side and metal side

A crimp seal has no adhesive and cannot be adjusted afterwards, so the glass and the metal must meet inside a very narrow window.

Inspection usually combines a 0.01 mm caliper, go/no-go ring gauges and a magnified check of the bead for chips. Cast or sintered parts cannot hold these figures.

Crimp, screw, crimpless or snap-on

Crimp and screw necks need different glass mould tooling, so changing your mind later means starting again. Decide the closure together with the capacity.

Where leaks actually come from

Nearly every leakage case we troubleshoot traces back to one of these, and each is visible before filling.

A workflow that prevents rework

Testing before you approve a run

Compliance checklist for EU and US shipments

• REACH declarations for glass, coating, collar and plastic parts.
• FDA contact-grade documentation for the US market.
• Prop 65 statement where a listed substance is present.
• Heavy metal and migration testing on decorations.
• Transit simulation on sealed units — alcohol fragrance ships as UN 1263.

Frequently asked questions

Is FEA 15 the same as 15/400?

Same finish family. FEA 15 is the European designation; 15/400 uses the older "diameter / finish-height code" convention, so 400 is not millimetres. Match on diameter and standard reference.

Can I put a screw cap on a crimp neck?

Not unless the glass was moulded with a thread. Hybrids exist, but a standard FEA crimp neck has nothing to engage. Choose the screw finish at drawing stage if refillability matters.

Which tolerance should I specify?

Request ±0.15 mm to ±0.30 mm on critical neck dimensions, expecting ±0.20 mm in production. On the collar, ask for bore +0.00 / −0.03 mm and concentricity within 0.03 mm TIR.

Specify once, then produce

The neck finish is decided once, early, and everything downstream depends on it. Match the FEA size to your capacity and dosing target, hold the tolerance tight enough to seal, buy the dispensing parts as one set, and prove it with the tests above.