
SC Square Bare Adapter
SC Square Bare Adapter is part of the bare adapter range built by Ever Expresslink Limited in Ningbo, China. It is built on the SC (Subscriber Connector) interface.
Temporary connections to unterminated fiber for test and splice verification
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Product Overview
SC Square Bare Adapter is part of the bare adapter range built by Ever Expresslink Limited in Ningbo, China. It is built on the SC (Subscriber Connector) interface.
It is the workhorse of FTTH and passive optical distribution: a technician can seat a port blind, inside a closure, wearing gloves, without rotating anything. SC bodies clip together into duplex pairs. Check polarity before you clip, because a reversed duplex clip is easy to build and hard to spot in a cabinet.
It is one of 7 items in this range. A typical application is power measurement on an unterminated distribution cable. What the range is built to give you there: available for the main connector port types and both ferrule sizes.
The problem it addresses is test kits that cannot reach bare fiber in a splice tray. 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 SC 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
- 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
- Slow fault-finding on a partly built link
Application Scenarios
- Enterprise backbone links
- Continuity checking before a splice closure is sealed
- Power measurement on an unterminated distribution cable
- Laboratory characterisation of fiber samples
- Fault localisation during a restoration
Who It Is For
- Splicing crews verifying continuity before closing a tray
- Test engineers measuring unterminated cable
- Laboratories characterizing fiber samples
- Training programs teaching splice verification
Technical Features
- SC (Subscriber Connector) interface
- SC bodies clip together into duplex pairs. Check polarity before you clip, because a reversed duplex clip is easy to build and hard to spot in a cabinet.
- Available for SC, FC, ST and LC port types
- Square-body versions for panel mounting
- Clamping mechanism sized for 250 µm or 900 µm fiber
- Standard connector interface on the test-set side
Materials
- Zirconia ceramic or precision metal guide
- Metal or thermoplastic body
- Spring clamping mechanism
- Thermoplastic dust cap
Specifications
| Product Designation | SC square bare adapter |
|---|---|
| Product Family | Bare Adapter |
| Connector Interface | SC (Subscriber 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
| LC | LC is half the footprint and doubles port density; SC is easier to handle in a crowded closure |
|---|---|
| FC | FC's threaded nut resists vibration; SC is faster to patch and re-patch |
Handling SC 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 SC Square Bare Adapter
What do you need from us to quote SC 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 SC Square Bare Adapter be supplied with a different connector interface?
Yes. SC (Subscriber 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.
What fiber sizes does a bare adapter accept?
Versions are available for 250 µm coated fiber and for 900 µm tight-buffered fiber. Confirm which one your splice tray presents before ordering.
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.
More Bare Adapter

ST Bare Adapter (Ref 429)
Used for fiber training and practical assessment.
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FC Bare Adapter
Used for power measurement on an unterminated distribution cable.
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ST Bare Adapter (Ref 343)
Used for laboratory characterisation of fiber samples.
View Details
FC Square Bare Adapter
Used for power measurement on an unterminated distribution cable.
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 SC 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.