Grooved Eyelets

Grooved eyelets provide a stable, insulated passage for conductors, leads, or mechanical elements that must pass through a housing or barrier. The grooved geometry supports consistent seating, improved retention, and controlled alignment during assembly. These components are used in applications where electrical isolation, thermal stability, and dimensional accuracy are required.

The eyelets on this page are organized by dimensional attributes to support efficient selection during design, prototyping, and procurement. Segmenting by size allows engineers to match eyelets to conductor diameters, housing openings, and joining processes without relying on part number order.

Functional Role in Assemblies

Grooved eyelets are used when a conductor or mechanical pin must pass through a wall while maintaining insulation, mechanical alignment, and separation between internal and external environments. The groove provides a defined seating point that improves retention during brazing, soldering, adhesive bonding, or mechanical fastening.

These components are commonly used in sensor housings, power electronics, vacuum devices, RF enclosures, aerospace hardware, and medical instrumentation. Their geometry supports stable alignment and consistent behavior during thermal cycling, vibration exposure, and high temperature joining processes.

Material and Construction Characteristics

Grooved eyelets are typically manufactured from alumina or comparable technical ceramics. These materials offer:

• High dielectric strength
• Low electrical loss
• Stable performance at elevated temperatures
• Wear resistance
• Chemical inertness
• Low thermal expansion relative to metals

These characteristics support reliable operation in assemblies exposed to heat, abrasion, or corrosive environments. The ceramic body maintains its insulating properties and dimensional accuracy during brazing, soldering, or mechanical retention.

Applications and Use Cases

Grooved eyelets are selected for assemblies that require:

• Electrical isolation between conductors and housings
• Stable alignment of pins or leads
• Defined seating surfaces for joining processes
• Resistance to heat, abrasion, or corrosive environments
• Long term dimensional stability under thermal cycling

Typical applications include hermetic feedthroughs, high temperature sensors, power modules, vacuum systems, and high frequency electronics. The grooved geometry supports consistent retention and alignment in assemblies where polymers or metals may deform or degrade.

FAQ

What Defines the Retention Behavior of a Grooved Eyelet?

Retention is influenced by groove depth, groove width, and seating diameter. These dimensions determine how the eyelet engages with a panel or bonding surface during assembly.

How Does the Groove Improve Performance in an Assembly?

The groove provides a defined seating point that stabilizes the eyelet during joining processes and reduces axial movement under vibration or thermal cycling.

Why Are Ceramic Materials Used for Grooved Eyelets?

Ceramic materials offer electrical insulation, thermal stability, and wear resistance. These properties support consistent behavior during high temperature joining and long term operation.

Which Dimensions Are Most Important During Selection?

Through hole diameter, body diameter, and seating diameter are typically the primary selection factors. These dimensions determine conductor fit, panel compatibility, and retention characteristics.