Firestik stud mounts have become the standard of the industry. Instead of inexpensive aluminum, Firestik uses chrome plated machine brass. Instead of 9/16″ (14mm) hex-stock, Firestik uses 5/8″ (16mm) stock. Instead of ABS or inferior plastic insulators, Firestik uses nylon. Instead of cadmium plated hardware, Firestik uses stainless steel. Furthermore, the heavy-duty 3/8″ center shanks can mean the difference between trouble free use and lost antennas. Some businesses in the industry have copied the look of the Firestik antenna studs but those “low-cost targeted” parts have a tendency of coming apart.
The K-4A should be used whenever a PL-259 terminated coax cable is to be used. This stud is designed for 1/2″ (13mm) holes. In a typical installation, antennas with 0.680″ (15mm) of exposed threads can be used without the fear of bottoming out before proper tightening is accomplished.
The K-4A stud will accept any of the Firestik, Firestik II, FireFly, RoadPal, 2-meter, 10-meter and scanner antennas. Also may be used with any 3/8″-24 threaded accessories.