WireMasters Blog

Amanda Kole

Flexible High-Temperature Coax Cable: RG142

One of our top versatile coax cables WireMasters stocks is RG142 also referred to as, M17/60-RG142. This product has proven to be an excellent solution for a vast range of applications, specifically in the military industry. This week WireMasters is highlighting this product as we provide you with detailed information on why we love this cable!

RG142 Overview

RG142 is a versatile 50-ohm coaxial cable used for all transmit-and-receive purposes.

RG142 coax cable features a solid silver-coated copper clad steel conductor, and 1000 feet weighs 43 lbs. Primary uses for RG142 include radio frequency, telecommunications, interconnects, and signal transfer applications in systems such as GPS, medical systems, and RADAR.  Because of its dual shielding, RG142 works very well in sensitive environments like avionics bays.  The solid silver covered copper clad steel conductor found in RG142 allows low-frequency electrical power to travel down the middle of the wire. 

Benefits of RG142

The MIL-C-17 specification defines the construction of RG142.  The shielding effectiveness of RG142 is between 40 and 60 dB.  It has a solid dielectric which provides a high rate of crush resistance, enabling it to be very effective in tactical operations and applications.

When buying a mil-spec RG142 for example, make sure the jacket marking shows the Mil-Spec part number "M17/60-RG142 MIL-DTL-17," as well as the manufacturer's CAGE code.

Part Number History

The military created a series of standard types of coaxial cable in the form "RG-#" or "RG-#/U."  Listed in MIL-HDBK-216 and published in 1962, they date from World War II but are now obsolete. The RG designation stands for Radio Guide; the U designation stands for Universal. The current military standard is MIL-C-17. MIL-C-17 numbers, such as "M17/60-RG142", are given for military cables and manufacturer's catalog numbers for civilian applications. However, the RG-series designations were so common for generations that they are still used, although critical users should be aware that since the handbook is withdrawn, there is no standard to guarantee the electrical and physical characteristics of a cable described as "RG-# type."

The Importance of VSWR Sweep Testing

We highly recommend constructions with VSWR (Voltage Standing Wave Ratio) when selecting a 50-ohm coaxial cable.  Manufacturing and sweep testing cables with concern for VSWR ensures a quality cable free of spikes over the frequency range.

Precision PTFE Dielectric

The PTFE dielectric used in RG142 is a high-temperature, high-performance construction which exhibits high dielectric strength and low capacitance in proportion to the cable’s dielectric constant. QPL manufacturers can manufacture PTFE dielectrics with tolerances tighter than called for within the MIL-DTL-17 specification.  These tighter tolerances ensure the uniformity of electrical characteristics, with specific respect to impedance, attenuation, and VSWR.

Construction Details

M17 Part


Center Conductor

.037” silver covered copper clad steel (SCCS)

Dielectric Diameter



Silver Plated Copper (2)

Shield Diameter




Overall Diameter


Bend Radius


Weight (lbs/mft)



Attenuation (dB/100 ft.)

Impedance (ohms)

50 +/-2

Capacitance (pF/ft.)


Max Voltage


100 MHz Typical/Maximum

3.8 / 4.4

400 MHz Typical/Maximum

8.1 / 9.3

1 GHz Typical/Maximum

13.7 / 15.3

Previous Article Wyre Tek Receives Additional QPL Status
Next Article WireMasters Achieves Superior Supplier Award
352 Rate this article:
No rating

Please login or register to post comments.



‪#‎15SUMMIT #AIX14 #HAI_EXPO15 10GB ethernet Cable 10GB ethernet Cables 12 Essentials 2014 Aviation Market Report 2015 2015 Boeing Performance Excellence Award 2016 3PL 3PL program 4 ball 2 50 ohm coax 50-ohm 51st International Paris Air Show 57th annual AEA 6070 QPL 737 75 ohm coax A350 Account Executive ACJ350 XWB BizJet acquisition adapters Advanced Electronically Scanned Array Advanced Research Projects Agency AEA AEA 2015 AEA Association AEA International AEA International Convention & Trade Show aerospace aerospace and defense Aerospace Industries Association aerospace news Aeroweek AESA Agusta Westland AW149 AgustaWestland AW609 agustawestland helicopters AIASPEAKS Airbus Airbus A350 Airbus A350-1000 Airbus A350-1000 XWB Airbus A400M Airbus EC725 Airbus H160 airbus helicopters Airbus Wire and Cable Aircraft Aircraft Electronics Association AIRCRAFT INTERIORS EXPO airframe Airshow AIX AIX 2015 AIX Show Al Worden Alumalight backshell aluminum Amanda Kole Amelia Earhart American Aviators americans Amphenol Amphenol Backshells Amphenol Harness Amphenol MicroCom Amphenol® µ-Com Amphenol PCD Amphenol PCD adapters Amphenol PCD Lightweight Amsterdam Anaheim Anaheim Convention Center and NEMA AP&M Apollo 15 apple store Arizona Arizona Warehouse Army Aviation Hall of Fame Army Aviation Mission Solutions Summit Army Aviation Summit AS9100 Rev C & ISO 9001:2008 AS9100 REV C AND ISO 9001:2008 Astronaut Scholarship Foundation Astronauts atlanta falcons attenuation aviation Aviation History aviation industry Aviation Network Aviation Week Aviation Week Network aviators avionic avionics