Isku-xidhka Adag (RM Couplings) ee leh duurka Taper Bore ayaa siiya isticmaaleyaasha si dhakhso leh oo fudud u hagaajinta ulaha adag ee isku xidha iyada oo la raacayo xulashada ballaaran ee cabbirrada shafka ee duurka Taper Bore. Garaafka labka ah waxa uu ku rakiban karaa baadiyaha dhinaca Hubka (H) ama dhinaca Flange (F). Dumarku had iyo jeer waxay haysataa meel baadiyaha ah oo ku habboon F kaas oo siinaya laba nooc oo isku xidhan oo suurtagal ah HF iyo FF. Markaad isticmaalayso ulaha jiifka ah, dooro kulanka ugu habboon.