Slotted Eyelets

Slotted eyelets provide an insulated, stable passage for conductors or mechanical elements that require controlled alignment through a housing or barrier. The slot feature supports applications where lead positioning, thermal expansion behavior, or assembly access requires an open side geometry rather than a closed through hole. These components are used in assemblies that rely on repeatable fit, electrical isolation, and long term material stability.

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

Slotted eyelets are used when a conductor, tab, or mechanical feature must be inserted laterally rather than threaded through a closed bore. The slot allows the component to be positioned without disturbing adjacent elements, which is useful in assemblies with limited access or pre installed wiring.

The geometry supports stable seating during soldering, brazing, adhesive bonding, or mechanical fastening. Slotted eyelets are commonly used in sensor housings, power electronics, vacuum devices, RF enclosures, aerospace hardware, and medical instrumentation. Their design supports consistent alignment and predictable behavior during thermal cycling, vibration exposure, and high temperature joining processes.

Material and Construction Characteristics

Slotted 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

Slotted eyelets are selected for assemblies that require:

• Lateral insertion of conductors or tabs
• Electrical isolation between conductors and housings
• Stable alignment of leads or mechanical features
• 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 slotted geometry supports consistent retention and alignment in assemblies where polymers or metals may deform or degrade.

FAQ

What Defines Compatibility Between a Slotted Eyelet and a Conductor or Tab?

Compatibility is based on slot width and slot depth relative to the conductor or tab dimensions. The component must fit securely without excessive clearance while maintaining electrical spacing.

How Does the Slot Improve Assembly Flexibility?

The slot allows lateral insertion, which supports assemblies with limited access or pre installed wiring. This reduces handling steps and minimizes disturbance to adjacent components.

Why Are Ceramic Materials Used for Slotted Eyelets?

Ceramic materials provide 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?

Slot width, outer diameter, and body length are typically the primary selection factors. These dimensions determine conductor fit, panel compatibility, and seating behavior.

Segmenting by dimension will alter the order of part numbers.