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Neck size mismatch is the single most common cause of leaking perfume bottles on the production line. An 18/415 screw pump solves that at the source: the thread spec is standardized, so the pump seats and seals correctly every time without custom tooling.
An 18/415 screw pump is a threaded dispensing pump sized to an 18mm bottle neck with a 415 thread finish, designed to screw directly onto matching perfume and fragrance bottles for repeated, leak-resistant use.
Because the 18/415 designation is an industry-standard neck finish, bottles and pumps from different suppliers remain interchangeable, which simplifies sourcing for brands running multiple bottle formats through the same filling line.
Four properties determine whether a screw pump performs reliably in daily use:
Plastic components are precision-molded to hold tight tolerances on the thread and seal surfaces.
Spring, actuator, dip tube, and housing are assembled into the finished pump mechanism.
Each batch is checked for seal integrity and consistent spray output before packing.
| Feature | 18/415 Screw Pump | Crimp Pump |
| Attachment method | Threaded, screws onto neck | Crimped onto neck, permanent |
| Removable / reusable | Yes | No |
| Bottle interchangeability | High, standardized thread | Limited, crimp-specific tooling |
| Typical use case | Refillable and premium bottles | Single-fill retail bottles |
Confirm neck compatibility before evaluating spray quality. A pump that fits perfectly but delivers a poor mist pattern, or a great actuator on the wrong thread size, are equally unusable on a production line.
Beyond neck fit, weigh spray fineness against dosage requirements, confirm the plastic and dip tube materials resist the specific fragrance formulation, and align finish and actuator design with the bottle's overall packaging aesthetic before committing to volume production.
The number 18 refers to the bottle neck diameter in millimeters, and 415 refers to the standardized thread finish, together defining how the pump and bottle mate.
Yes, because it threads onto the neck rather than being crimped in place, it can be removed and reattached, which supports refillable perfume bottle designs.
Manufacturers commonly offer custom actuator shapes, surface finishes, colors, and dip tube lengths to match a brand's bottle design.
Yes, provided the internal materials are chemical-resistant to the specific oil formulation, the same 18/415 pump structure is commonly used for essential oil and aromatherapy bottles.
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