Not interchangeable with CST-100 contacts and housings. TE Connectivity CST 100 II Receptacle Housings. CST 100 II receptacle style free hanging housings with a 2.54mm centreline for wire to board and applications. These CST 100 II receptacle housings are made from UL 94V-0 nylon GF, have latches and a polarizing tab for secure mating and alignment and mate with MTA .100 headers and CST .100 shrouded headers. The receptacle crimp contacts for use in these CST 100 II housings need to be purchased separately, see stock number ; 9097390 9097390 typically. A keying plug is also available, see stock number ; 9097390 9097390