The A-42-BLK is a small plastic part produced by SERPAC. It is black, with dimensions of 42mm in length, and has a shallow, three-sided pyramidal shape. The bottom of the pyramidal shape has a 16mm base, and the sides of the pyramid are 12mm in length. The part has four 3mm threaded inserts dispersed around its sides, which allow it to be securely attached to other parts of a device. The A-42-BLK is a versatile, multipurpose part and is used in a variety of applications, such as medical devices, telecommunications, and automotive.