32 best shown in fig2 and 3a includes an axial bore 35 sized for a snug fit with the center conductor of a coax cable spring fingers 36 may be included to secure the center conductor within the bore and to improve the conduction between the center conductor and the step up pin 14 the spring fingers 36 project into the pin body 32 and are directed away from the bore opening as shown the axial bore 35 is a blind bore with an open end 37 tabs 38 project outward from the pin body 32 toward the opening of the bore the cable guide 34 is either integrally formed with the pin body 32 or affixed thereto such as by an interference fit or an adhesive the cable guide 34 is complementarily contoured to fit into the slope of the pin guide 28 the outward bias of the tabs 38 assists in retaining the step up pin 14 within the pin guide 28 the step up pin 14 is applied to a coax cable 40 as shown in fig3 a and 3b as shown in fig4 a and 4b a sidewall bore 39 is either machined or molded into the compression ring 24 for the storage of the step up pin 14 prior to assembly the sidewall bore 39 is configured for a snug fit with the pin body 32 to prevent the pin 14 from being separated from the connector body 12 also the outward bias of the tabs 38 resists separation of the step up pin.