The 131-3701-401 is a rear-mount bulkhead SMB jack assembly connector designed for RF and high-frequency applications. The connector features a brass body with cold plating of 0.00001 inches minimum over nickel plating of 0.00005 inches minimum and copper plating of 0.00005 inches minimum, brass contacts with similar plating specifications, a teflon insulator, and a phosphor bronze washer with specified plating layers. It is rated for high potential withstanding voltage of 800 VRMS at 4 and 7 MHz, with an engage/disengage force of 14 lbs initial and 14 lbs maximum after durability testing. The connector operates over a temperature range of -65°C to +165°C, meets MIL-C-39012 environmental standards including thermal shock, corrosion, shock, and vibration testing per MIL-STD-202, and is rated for a minimum of 500 mating cycles. This connector is ideal for military and aerospace applications requiring reliable RF connections with stringent environmental performance.