RG-174 Coaxial RF Cable Assemblies Crystek Corporation RG-174 Coaxial RF Cable Assemblies feature adhesive shrink tubing over the crimp area for strain relief, a center conductor composed of 26 AWG bare copper-covered steel, and tinned copper braid (90% coverage) shielding. The Crystek RF Cable Assemblies are insulated with polyethylene and jacketed with black PVC, as well as being RoHS compliant. Crystek Corporation RG-174 Cable Assemblies´ operating temperature is -40ºC to +85ºC. For electrical characteristics, see datasheet.