FC Square Bare Adapter
FC Square Bare Adapter is part of the bare adapter range built by Ever Expresslink Limited in Ningbo, China. It is built on the FC (Ferrule Connector) interface.
Temporary connections to unterminated fiber for test and splice verification
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Product Overview
FC Square Bare Adapter is part of the bare adapter range built by Ever Expresslink Limited in Ningbo, China. It is built on the FC (Ferrule Connector) interface.
FC uses a 2.5 mm zirconia ceramic ferrule inside a threaded metal coupling nut, so the mated pair is locked mechanically rather than held by a spring latch. FC needs the alignment key to seat in the adapter slot before the nut is tightened. Cross-threading a keyed FC is the single most common cause of high loss on an FC link.
It is one of 7 items in this range. A typical application is continuity checking before a splice closure is sealed. What the range is built to give you there: square and standard body versions for different panel and bench mounts.
The problem it addresses is needing a measurement on fiber that has not been terminated yet. A practical note that applies across this range: release the clamp before withdrawing the fiber to avoid scoring it. Specifications for a particular configuration are confirmed on the quotation rather than assumed from the designation.
Key Benefits
- Supplied as FC Square Bare Adapter, so the part you receive matches the designation you ordered against
- Measure without spending a connector and a termination cycle
- Reusable across many fibres in a single session
- Available for the main connector port types and both ferrule sizes
- Compact enough to live in a splicing kit
Problems It Solves
- Damaged fiber from improvised clamping methods
- Test kits that cannot reach bare fiber in a splice tray
- Needing a measurement on fiber that has not been terminated yet
- Terminating a fiber purely to verify continuity, then cutting the connector off
Application Scenarios
- Carrier transmission equipment
- Laboratory characterisation of fiber samples
- Fault localisation during a restoration
- Fiber training and practical assessment
- Continuity checking before a splice closure is sealed
Who It Is For
- Test engineers measuring unterminated cable
- Laboratories characterizing fiber samples
- Training programs teaching splice verification
- Maintenance teams fault-finding on a partly built link
Technical Features
- FC (Ferrule Connector) interface
- FC needs the alignment key to seat in the adapter slot before the nut is tightened. Cross-threading a keyed FC is the single most common cause of high loss on an FC link.
- Square-body versions for panel mounting
- Clamping mechanism sized for 250 µm or 900 µm fiber
- Standard connector interface on the test-set side
- Reusable clamp designed for repeated insertion
Materials
- Zirconia ceramic or precision metal guide
- Metal or thermoplastic body
- Spring clamping mechanism
- Thermoplastic dust cap
Specifications
| Product Designation | FC square bare adapter |
|---|---|
| Product Family | Bare Adapter |
| Connector Interface | FC (Ferrule Connector) |
| Manufactured In | Ningbo, China |
| Warranty | One year against defects in materials and workmanship |
Values shown are those carried by the product designation. Dimensional and optical values for a specific order are confirmed on the quotation.
Manufacturing Process
- Guide bore inspection
- Clamp mechanism assembly and force setting
- Mating interface verification
- Repeat-insertion durability sampling
- Cleaning and packing
Quality Control
- Guide bore concentricity sampled per lot
- Clamping force verified on sample units
- Repeat-insertion cycling on samples
- Loss repeatability measured with a reference fiber
- Visual inspection of the mating interface
Customization Options
- Connector interface type
- 250 µm or 900 µm fiber acceptance
- Square or standard body
- Kitted with cleaver and cleaning consumables
Compared With Other Options
| SC | SC seats faster with a push-pull motion; FC holds up better where the cabinet vibrates or ports get bumped |
|---|---|
| ST | ST twists on with a bayonet in a quarter turn; FC's threaded nut takes longer but resists loosening |
Handling FC Square Bare Adapter
Before You Order
- Cleave the fiber square with a precision cleaver before insertion
- Clean the fiber with lint-free wipe and solvent
- Insert to the stop and close the clamp without forcing it
In Service
- Treat the reading as indicative rather than as a certified link measurement
- Release the clamp before withdrawing the fiber to avoid scoring it
- Clean the guide bore between fibres
Questions About FC Square Bare Adapter
What do you need from us to quote FC Square Bare Adapter?
The quantity, the destination and anything that has to match on your side: connector and polish at each end, fiber mode and core size, and length where the item is an assembly. If you are matching a part you already buy, send the sample and we will quote against it.
Can FC Square Bare Adapter be supplied with a different connector interface?
Yes. FC (Ferrule Connector) is what this designation carries, and the same family is stocked across the other mainstream connector standards. Tell us the port you have to mate with and we will confirm the equivalent part.
Is a bare adapter measurement as accurate as a terminated one?
It is repeatable enough for continuity and relative loss checks, which is what a splicing crew needs. For certified link measurements, terminate properly or use a reference-grade test cord.
How many times can one adapter be reused?
They are designed for repeated insertion across a working session and beyond. Replace when the clamp no longer holds the fiber firmly or the guide bore shows wear.
Which connector types are available?
SC, FC, ST and LC interfaces are the common ones, in both standard and square-body form. Tell us your test set's port type and we will match it.
More Bare Adapter
FC Bare Adapter
Used for power measurement on an unterminated distribution cable.
View Details
ST Bare Adapter (Ref 343)
Used for laboratory characterisation of fiber samples.
View Details
LC Square Bare Adapter
Used for power measurement on an unterminated distribution cable.
View Details
SC Square Bare Adapter
Used for fault localisation during a restoration.
View DetailsGuides Cases and Industries
Power Meter and OTDR Testing Basics
Two instruments that answer different questions, why you need both, and what to write down so the result means something later.
Product GuideWhat a Hybrid Fiber Adapter Does and When to Use One
Joining two different connector standards without cutting anything, and the three things that still have to match.
Deployment ProfileCampus Backbone Connector Migration
Phasing a legacy ST or FC estate onto SC and LC equipment without cutting anything
IndustryTest Measurement and OEM Integration
Component-level supply for instrument builders and cable assembly houses
Request Pricing For FC Square Bare Adapter
Tell us the quantity and destination. If you are matching a part you already buy, send the sample and we will quote against it.