1-5747871-3 is an AMPLIMITE HD-20 subminiature D connector receptacle designed for high-density applications requiring secure mating hardware. This receptacle features 9 contact positions with fixed female screwlocks for reliable connection and retention on printed circuit boards. The connector employs duplex plating with gold flash on the mating end and tin on the termination end, with a minimum nickel underplate of 0.00127 inches (0.00127 mm), ensuring excellent corrosion resistance and electrical performance. Dimensional specifications include a shell size of 1.213 inches (30.81 mm) length and 0.984 inches (24.99 mm) width, with a post length of 0.170 inches (4.32 mm) recommended for PCB thicknesses of 0.093 to 0.125 inches (2.36 to 3.18 mm). This connector is ideal for applications requiring compact, high-reliability interconnections in industrial, telecommunications, and military equipment where secure locking mechanisms and superior contact durability are essential.