ST Connector

ST is the abbreviation of “Stab & Twist” or “Straight Tip”. ST connector has a bayonet style mount, and a 2.5 mm long cylinder of ceramic (common) or polymer ferrule to accommodate the entire fiber. The installation method is similar to a snap-on light bulb, and it is inserted and rotated half a turn to the bayonet. The core of the ST connectors is exposed.
The ST fiber connector was developed by AT&T, and its main parameters are equivalent to those of FC and SC connectors. Straight Tip ST connectors usually used in multi-mode device connections, and are often used in ODF(optical distribution frames). For 10Base-F connections, the connector is usually ST type.

ST Connectors Feature

  • Bayonet style connector for easy insertion
  • Factory-polished end face
  • Fusion splice connectivity
  • Splice protection within connector body
  • Accommodates 0.9mm, 2mm and 3mm fiber types
  • Available with 0.9mm, 2mm and 3mm boots

ST Connectors Applications

Straight Tip ST connectors are used most commonly in fiber optic networking applications, including:

  • Local area networks
  • Data processing networks
  • Distribution application
  • Premises distribution

At Bonelinks we offer a huge variety of fiber connector types. Beside Straight Tip Connector (ST Connectors), we also provide Lucent Connectors (LC Connectors), Square Connectors (SC Connectors), Ferrule Connectors (FC Connectors), Multi-Fiber Push On Connectors (MPO Connectors) and other products. You can view all of our fiber optic connector solutions to find the perfect optical connector for your optic networking.

Connector Type


Connector Boot Color

Blue, Green, Beige

Connector Boot Aperture (MM)

0.9 or 2.0 or 3.0

UPC Endface Concentricity (MM)


Connector Endface


Ceramic Ferrule OD (MM)


Ceramic Ferrule ID (MM)


Ceramic Ferrule Stiffiness (HV)


Ceramic Bending Strength (MPA)


Temperature Range



-40℃ to 70℃ (-40°F to 158°F )


-40℃ to 85℃ (-22°F to 185°F )


-40℃ to 85℃ (-40°F to 185°F )

Mechanical Properties


Insertion Loss (dB)

Typical Values≤0.2; Max Values≤0.3

Mating (times)

Max Values≤0.2; ≥1000

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