ST fiber optic adapter metal housing bayonet mount
ST fiber optic adapter plastic housing single mode
Fiber Optic Adapter

STFiber Optic Adapter — Bayonet Mount, Metal & Plastic

ST fiber optic adapter with bayonet-style coupling for connecting two ST-terminated fibers. Available in metal and plastic body options. Zirconia ceramic sleeve for precise 2.5mm ferrule alignment. Widely used in legacy Ethernet, industrial control, and military fiber networks.

Adapter TypeST Simplex
Fiber ModeSM 9/125μm, MM 50/125μm, MM 62.5/125μm
Insertion Loss≤0.3dB (SM), ≤0.2dB (MM)
Return Loss≥45dB (SM), ≥50dB (MM)
Durability≥1,000 mating cycles
Operating Temperature-40°C to +75°C
Specifications

Technical Specifications

Adapter Type
ST Simplex
Polish Type
UPC
Fiber Mode
SM 9/125μm, MM 50/125μm, MM 62.5/125μm
Sleeve Material
Zirconia Ceramic / Phosphor Bronze
Housing Material
Metal / Plastic
Insertion Loss
≤0.3dB (SM), ≤0.2dB (MM)
Return Loss
≥45dB (SM), ≥50dB (MM)
Durability
≥1,000 mating cycles
Operating Temperature
-40°C to +75°C
Coupling Mechanism
Bayonet twist-lock
Mounting
D-type panel mount
Standards
IEC 61754-2 · TIA-604-2 (FOCIS 2) · Telcordia GR-326
Key Features

Engineered For Performance

Bayonet Twist-Lock Coupling

Quarter-turn bayonet mechanism provides secure, vibration-resistant connections with quick connect/disconnect — faster than threaded FC while more secure than push-pull designs.

Dual Sleeve Options

Zirconia ceramic sleeve for single mode applications requiring maximum precision, and phosphor bronze sleeve for cost-effective multimode installations.

Metal and Plastic Housing

Metal housing for industrial and military applications requiring durability and EMI shielding; plastic housing for cost-sensitive enterprise and campus network deployments.

Legacy Network Compatibility

Maintains interoperability with existing ST-based 10BASE-FL, 100BASE-FX Ethernet, and FDDI networks, supporting brownfield upgrades without full re-termination.

Typical Applications

01

Legacy Ethernet Networks

ST adapters in 10BASE-FL and 100BASE-FX multimode fiber Ethernet switches, media converters, and patch panels in campus and building backbone networks.

02

Industrial Control Systems

Bayonet-lock ST connections in factory automation, SCADA, and process control networks where vibration resistance and rugged construction are essential.

03

Military & Defense

ST adapters in military communication systems, shipboard networks, and field-deployable fiber equipment where reliable, quick-connect fiber coupling is required.

Interested in this ST Adapter?

Tell us your quantity, cable length, and any custom requirements. Our engineering team will respond with a detailed quote within 24 hours.

TTI Fiber 12,000 sqm manufacturing facility in Shenzhen, China

Why TTI Fiber

Trusted Manufacturer Since 2013

TTI Fiber is a professional fiber optic manufacturer based in Shenzhen, China. We provide full OEM/ODM services with factory-direct pricing and dedicated engineering support.

12,000sqmManufacturing Base
15+yearsIndustry Experience
100+countriesProducts Exported
30+brandsGlobal Partners
ISO9001ISO14001CERoHSCPRREACH
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