The traditional model is the SQ-8 Multipin Connector using the circular size 21 shell per MIL-DTL-38999 Series III, supplied with eight (8) coaxial microwave inserts, terminating always one end of each cable assembly. As the inserts are spring loaded and use a bayonet catch, the cable assemblies can be inserted and replaced in seconds. The inserts were designed for Spectrum’s Type 11 and Type 43 cables. The SQ-8 does not mate with the TQ-, IQ-, BQ or CQ-Series.
The cross section view demonstrates the perfect engineering that has lead to the success of the SQ-8:
Every cable assembly terminated with an SQ-8 Insert can be replaced in minimum time by simply engaging/disengaging a bayonet catch. The inserts are spring loaded for blind mating / self alignment purposes. The outer conductor of the female insert protrudes above the reference plane of the SQ-8. During the mating process the female outer conductors will catch first the mating plane, align all eight female outer conductors prior to capturing and aligning the male outer conductors, before the center conductors will even come close to their mating positions.