... ,HSTS,HWP,LT,MT,MPP,MSP,PP,RR,SC,SMT,SRUB,SP,SHPP,SFP,SPP, SRC,UFP,UW,UP ... super high temperature 350° F(177° C)Purpose:To plug plain and threaded holes, for the plating, anodizing ... the larger end through into the hole. As the plug is pulled the large diameter stretches and becomes smaller, ... allowing the plug to fit through the hole. Once the large end ...