Fischer-Elektronik-Transistor-Retaining-Fischer-Elektronik-THFM-1-p-The-Fischer-Elektronik-Transistor-Retaining-Spring-THFM-1-is-a-well-designed-universal-retaining-spring-manufactured-with-stainless-steel-&-equipped-with-quick-&-easy-transistor-fitting-For-housing-TO-218-TO-220-TO-247-TO-264-SOT-32-&-various-SIP-multiwatt-p-Fischer-Elektronik-THFM-1-Transistor-Retaining-Spring-1