To construct a coded part number for the PT series use the breakdown shown here. Start with the letters PT in the position 1; the desired shell style in position 2; the service class, which would indicate the crimp or solder contact type, in position 3; the shell size in position 4; a contact insert arrangement in position 5; the contact type, whether pin or socket, in position 6; the insert arrangement rotation in position 7 if desired, or leave blank for normal rotation; and any type of modification, such as plating or strain relief, in position 8. A more comprehensive list of options and modifications can be found in the Amphenol PT series catalog, which can be found at http://www.amphenol-industrial.com/images/catalogs/PT.pdf.