Aluminum Crimp Cap: Component Specs, Materials & Applications

Component Specifications

Definition

A precision-engineered aluminum component designed to create a hermetic seal on pharmaceutical vials through crimping technology. It provides both primary containment integrity and tamper-evidence functionality in pharmaceutical packaging systems.

Working Principle

The aluminum cap is placed over the vial's rubber stopper and glass neck, then mechanically crimped using specialized equipment. The crimping process deforms the aluminum skirt around the vial's flange, creating a permanent mechanical lock while maintaining compression on the rubber stopper to ensure seal integrity.

Materials

Aluminum alloy 1100 or 3003, typically 0.2-0.3mm thickness, with optional epoxy or thermoplastic liner for enhanced sealing

Technical Parameters

Parameter	Typical range	Notes & selection driver
Height	6-12mm depending on application
Diameter	13mm, 20mm, 28mm (standard pharmaceutical sizes)
Liner Type	PTFE-faced rubber, Buna-N, or silicone
Crimp Profile	Single or double fold
Surface Finish	Anodized or lacquered for corrosion resistance

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 8362-4, ISO 8871, DIN 58366, USP <381>

Parent Products

This component is used in the following industrial products

Pharmaceutical Vials

Sterile glass or plastic containers designed for storing and dispensing pharmaceutical products, vaccines, and injectable medications.

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Engineering Analysis

Risks & Mitigation

Incomplete crimp leading to seal failure
Aluminum corrosion from aggressive formulations
Particulate generation during crimping
Inconsistent crimp force affecting seal integrity

FMEA Triads

Trigger: Incorrect crimping tool settings
Failure: Leaking seal or cap detachment
Mitigation: Regular calibration of crimping equipment and visual inspection systems

Trigger: Material fatigue from repeated sterilization
Failure: Crack formation in aluminum skirt
Mitigation: Implement maximum sterilization cycle limits and material testing protocols

Trigger: Incompatible liner material with drug formulation
Failure: Chemical degradation and seal compromise
Mitigation: Conduct compatibility studies during product development phase

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1mm on critical dimensions, crimp height variation ≤0.3mm

Test Method

Helium leak testing <1x10^-6 mbar·L/s, seal integrity testing per ASTM F2338, extractables testing per USP <1663>

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Aluminum Crimp Cap

Manufacturer profiles associated with Aluminum Crimp Cap.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the purpose of the aluminum crimp cap in pharmaceutical packaging?

It provides a hermetic seal to maintain product sterility, prevents contamination, and offers tamper-evidence to ensure patient safety.

Can aluminum crimp caps be used with different vial materials?

Yes, they are compatible with glass vials (Type I, II, III) and some polymer vials, but crimping parameters must be adjusted accordingly.

How are crimp caps removed from vials?

They require specialized decapping tools or pliers that cut through the aluminum skirt without damaging the vial or contaminating the contents.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Aluminum Crimp Cap