FireStik K-4ADD Stainless Steel Disc Mount The FireStik K-4ADD is a heavy-duty stainless steel disc mount designed for secure flat surface antenna installations. With a durable SO-239 stud and standard 3/8 x 24 antenna thread this mount supports antennas up to 4 feet tall providing a reliable and stable mounting solution. Key Features: ✅ Manufacturer Part Number: K-4ADD ✅ Flat Surface Mounting – Ideal for truck beds toolboxes and other flat surfaces. ✅ Heavy-Duty Stainless Steel – Corrosion-resistant for long-term durability. ✅ Includes (2) 1/2 Stainless Steel Discs – Provides a secure hold. ✅ SO-239 Stud (K-4A) – Ensures a strong connection. ✅ Standard 3/8 x 24 Thread – Compatible with most CB and ham radio antennas. ✅ Supports Antennas Up to 4 Feet Tall – Ideal for CB and amateur radio setups. 🔹 Perfect for durable flat surface antenna installations requiring a solid and rust-resistant mount!