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RF Coaxial Connector Torque Specifications

Click to visit Coaxial Dynamics  Dong Jin Technology Innovation  Please click here to visit theCross RF website.
DYNE-TECH  Fairview Microwave
Properly torquing of threaded RF coaxial connectors is essential for reliable, maximum performance interfaces. It not only ensures that the initial contact is proper, it also protects against changes in geometry during handling and operational environment conditions.

Related Pages on RF Cafe
- RF Coaxial Connector Torque Specifications
- Coaxial Connector Descriptions & Drawings
- Coaxial Connector Usage Properties
- RF Coaxial Connector Torque Specifications
- Connector & Adapter Manufacturers
- EW Radar Handbook - Connectors


ConnectorCoupling Torque
N-cm/lb-in		Open-End
Wrench Size
Type DIN 7-163500/31027 & 32 mm
Type F (75 ohm)168/157/16
Type FD168/15 
7 mm (APC-7)135/123/4 in (19 mm)
Type N 50/75 ohm135/12
135/12		25/32 in (20 mm)
3/4 in (19 mm)
3.5 mm90/88 mm
2.4 mm90/88 mm
2.92 mm (K)90/88 mm
1.85 mm (V)90/85/16 in (8 mm)
SMA, OSM45/4 (economic)
100/9 (standard)
195/17 (hermetic)		5/16 in (8 mm)
5/16 in (8 mm)
 7 mm
SSMA70/60.25
SMC35/36 mm
TNC56/59/16 (15 mm)
1.0 mm45/46 mm

These values were originally pulled from Agilent's calibrated torque wrench page, but it has disappeared. Additional information gathered from other online sources such as the Huber+Suhner and Radiall websites. Torque values can vary considerably between vendors.  1 lb-in = 11.30 N-cm

Fairview Microwave sells calibrated torque wrenches.


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