Check the listing for details. Heavy Duty CB Antenna Stud Mount Adapter Copper Nickel Plated SO-239 C417. Condition: New. Listed at 9.99 USD. About this itemPowerful Features: Antenna mount is great for replacing lost or damaged old pieces. Standard size, 3/8 x 24 thread is ideal for holding 102" antennas and most antennas. Can be used on any mounting surface with 1/2" (13mm) holes, suitable for most vehicles such as jeep trucks, etc.Ease of Use: Installation takes just a few minutes. Make sure the white insulating washer goes on top of the mount, the stud base from the bottom through it, then the flat washer on top, then the split washer. The antenna has to be isolated from the mounting bracket so make sure it is centered on the plastic washer or it will short out your system. Antenna mounts feature threaded screw-in coaxial terminations for easy removal and installation.Firmly Connect: Stud mount is strong enough to withstand all the pressure from the antenna without worrying about the antenna swinging and falling. The antenna stud mount acts as a bridge between the antenna and the coaxial feedline. It allows for efficient transfer of your transmitted and received signals to and from the transceiver, guaranteeing a clear and loud signal.Durable Material: CB radio antenna mount is made of all-copper nickel-plated material to ensure durability, and the excellent material ensures a strong and tight connection, not easy to break. White washer provides good insulation and keeps the antenna from grounding out on your mounting point. Shipping 1. We only ship within USA. 2. Item will be shipped out within 48 hours upon receipt of payment, and it takes about 4-7 BUSINESS DAYS for delivery 3. Please make sure your address in eBay is correct. If you want to change the address please E-mail us right after you pay for the item.