ISO 8362-7: Aluminium-Plastics Caps Without Overlapping Plastics Part

ISO 8362-7 is the international standard that specifies aluminium-plastics combination caps for injection vials in which the plastic part does not overlap the aluminium, defining their forms, dimensions, and requirements. It is the companion to ISO 8362-6: both cover combination (aluminium-plus-plastic) caps, but Part 7 covers the construction where the plastic top sits within or flush with the aluminium rather than covering its edge. It is Part 7 of the ISO 8362 series, “Injection containers and accessories.” The current edition is ISO 8362-7:2006.

This guide explains what ISO 8362-7 covers, how the “without overlapping plastics part” construction differs from ISO 8362-6, and how the standard fits the ISO 8362 series.

Key takeaways

ISO 8362-7 specifies aluminium-plastics combination caps without an overlapping plastics part: combination caps where the plastic does not cover the aluminium edge.
It is Part 7 of the ISO 8362 series; the current edition is ISO 8362-7:2006.
The full title is “Injection caps made of aluminium-plastics combinations without overlapping plastics part,” distinguishing it from the overlapping construction of ISO 8362-6.
Both Part 6 and Part 7 caps are aluminium-plastic seals that crimp over the stopper; the difference is how the plastic top is formed.
ISO 8362-7 ensures the cap fits the vials of ISO 8362-1 and the closures of ISO 8362-2.
As with all the cap parts, the seal holds the stopper compressed against the glass to maintain the container closure system.

What is ISO 8362-7?

ISO 8362-7 is the part of the ISO 8362 series that defines aluminium-plastics combination caps in which the plastic part does not overlap the aluminium. It is published by the International Organization for Standardization (ISO), and the current edition is ISO 8362-7:2006.

Like the caps of ISO 8362-6, an ISO 8362-7 cap is a combination seal: an aluminium shell crimped over the rubber stopper, with a moulded plastic top. The distinguishing feature is in the title, “without overlapping plastics part.” In a Part 7 cap the plastic component sits within or flush with the aluminium and does not overlap the outer edge of the aluminium shell, whereas in a Part 6 cap the plastic part overlaps or covers the aluminium. ISO 8362-7 standardises the forms, dimensions, and requirements of this construction so the cap is compatible with the vials and closures of the rest of the series.

ISO 8362-7 vs ISO 8362-6: the overlapping plastics part

The difference between ISO 8362-7 and ISO 8362-6 is whether the plastic part overlaps the aluminium: Part 6 covers the overlapping construction, Part 7 the non-overlapping one. Both are aluminium-plastic combination caps that crimp over the stopper; the construction of the plastic top is what separates them.

Aspect	ISO 8362-6	ISO 8362-7
Cap type	Aluminium-plastics combination	Aluminium-plastics combination
Plastic part	Overlaps or covers the aluminium	Does not overlap the aluminium
Current edition	2010	2006
Sealing method	Aluminium crimped over the stopper	Aluminium crimped over the stopper

In practice, the choice between an overlapping and a non-overlapping plastic construction affects how the plastic top is moulded and how it looks and opens, not how the aluminium crimps the stopper to seal the vial. The integrity of the seal comes from the aluminium crimp in both cases. A specific cap design should be checked against the precise scope of Part 6 or Part 7 to confirm which applies.

How ISO 8362-7 fits the ISO 8362 series

ISO 8362-7 is one of three cap parts, sitting alongside the plain aluminium caps of Part 3 and the overlapping combination caps of Part 6. Each part addresses a component of the injection-vial system, dimensioned for compatibility.

Part	Scope
ISO 8362-1	Injection vials made of glass tubing
ISO 8362-2	Closures for injection vials
ISO 8362-3	Aluminium caps for injection vials
ISO 8362-5	Freeze drying closures for injection vials
ISO 8362-6	Caps made of aluminium-plastics combinations
ISO 8362-7	Aluminium-plastics combination caps without overlapping plastics part

All three cap parts crimp over the closure of Part 2 in the vial of Part 1. The components are dimensioned to match, so a Part 7 cap pairs with a conforming stopper and vial and crimps cleanly on a capping line.

How this works in practice at Autofits

Autofits manufactures aluminium-plastic combination seals across the FlipTop range, the cap family covered by ISO 8362-6 and 8362-7, in 13, 20, and 32 mm sizes. The FlipTop Optima seals are offered in several flip-feature sub-types, and the plastic disc and the metal can both be coloured, printed, and embossed for product-specific identification. Which ISO part applies to a given design depends on the exact construction of the plastic top, overlapping or not; Autofits develops its combination seals around the standards of specific pharmaceutical customers, so a customer can select the construction its market and filling line expect. Production runs under an ISO 15378:2017 quality system, alongside ISO 9001:2015 and ISO 14001:2015 certification and a Drug Master File, in a 75,000 sq ft Nashik facility with an ISO Class 8 cleanroom and high-speed visual inspection for dimensional control. The full certification set is on the quality page.

Frequently asked questions

What does ISO 8362-7 cover?

ISO 8362-7 specifies aluminium-plastics combination caps for injection vials in which the plastic part does not overlap the aluminium. It is Part 7 of the ISO 8362 series, “Injection containers and accessories,” with the full title “Injection caps made of aluminium-plastics combinations without overlapping plastics part.” It standardises the caps’ forms, dimensions, and requirements so they are compatible with the vials and closures of the series.

What is the difference between ISO 8362-6 and ISO 8362-7?

Both cover aluminium-plastics combination caps that crimp over the stopper. ISO 8362-6 covers caps where the plastic part overlaps or covers the aluminium. ISO 8362-7 covers caps where the plastic part does not overlap the aluminium. The difference is in the construction of the plastic top, not in how the aluminium seals the vial.

What is the current edition of ISO 8362-7?

The current edition is ISO 8362-7:2006. ISO standards are reviewed periodically, so confirm the current edition and its requirements directly with ISO before relying on any specific clause.

Does the overlapping plastics part affect the seal?

No. In both ISO 8362-6 and ISO 8362-7 caps, the seal comes from the aluminium shell crimped over the rubber stopper, holding it compressed against the glass. Whether the plastic part overlaps the aluminium affects how the plastic top is moulded, how it looks, and how it opens, not the integrity of the crimped seal.

Which ISO part applies to a flip-off seal?

A flip-off seal is an aluminium-plastics combination cap, so it falls under ISO 8362-6 or ISO 8362-7 depending on whether its plastic top overlaps the aluminium. A specific design should be checked against the precise scope of each part, since the two differ only in the construction of the plastic component.

Sources

ISO: ISO 8362-7:2006, Injection containers and accessories, Part 7: Injection caps made of aluminium-plastics combinations without overlapping plastics part (https://www.iso.org/standard/43551.html)
ISO: ISO 8362-6:2010, Injection containers and accessories, Part 6: Caps made of aluminium-plastics combinations for injection vials (https://www.iso.org/standard/52806.html)

*Last updated: 2026-06-18. This article is general technical information, not regulatory or compliance advice; confirm current standard editions and requirements with ISO.*