Check the listing for details. Firestik K4 Antenna Stud Mount. Condition: New. Listed at 2.36 USD. FIRESTIK K-4 K4 CB ANTENNA STUD MOUNT Firestik stud mounts have become the standard of our industry. This wasn't by accident. It was because users learned to appreciate their outstanding design and material quality. Instead of inexpensive aluminum, we use chrome plated machine brass. Instead of 9/16" (14mm) hex-stock, we use 5/8" (16mm) stock. Instead of ABS or inferior plastic insulators, we use nylon. Instead of cadium plated hardware, we use stainless steel. Furthermore, our heavy-duty 3/8" center shanks can mean the difference between trouble free use and lost antennas. The K-4 stud utilizes ring terminal connectors (supplied)making it compatible with non-PL-259 terminated coaxial cables. In a typical installation, antennas with 0.600" (15mm) of exposed threads can be used without the fear of bottoming out before proper tightening is accomplished. The K-4 can be used in any mount or mounting surface with a 1/2" (13mm) hole. Either stud will accept any of our Firestik, Firestik II, FireFly, RoadPal, 2-meter, 10-meter and scanner antennas. Also may be used with any 3/8"-24 threaded accessories. 1 Year Limited WarrantyIN-STOCK SHIPPING/HANDLING INFORMATION: UPS SHIP ONLY/ includes insurance-see shipping calculator PAYMENT INFORMATION: We accept Paypal.