Rotor Trigger Stop Arm Retaining Screw for YamahaTrombone / Bass TromboneCompatible Yamaha Models: YBL-322 ~ YBL-322E ~ YBL-322R ~ YBL-322RE ~ YBL-421G ~ YBL-421GE ~ YBL-421GSE ~ YBL-605(Bass) ~ YBL-612 ~ YBL-612(#201619-) ~ YBL-612(2) ~ YBL-612R ~ YBL-612R(2) ~ YBL-613 ~ YBL-613H ~ YBL-613HEL ~ YBL-613HS ~ YBL-613R ~ YBL-620GE ~ YBL-620GSE ~ YBL-622 ~ YBL-622S ~ YSL-350C ~ YSL-356G ~ YSL-356GE(G-LAC.) ~ YSL-356GU ~ YSL-356R ~ YSL-356RE ~ YSL-446G ~ YSL-446G(G-LAC) ~ YSL-446GE ~ YSL-448G ~ YSL-448G(G-LAC) ~ YSL-448GE ~ YSL-456GJ ~ YSL-456GJ(2) ~ YSL-548GAL ~ YSL-603(Tenor Bass) ~ YSL-620(#400429-) ~ YSL-643 ~ YSL-643R ~ YSL-646 ~ YSL-646(2) ~ YSL-646E ~ YSL-646S ~ YSL-646SE ~ YSL-648 ~ YSL-648(2) ~ YSL-648E ~ YSL-648R ~ YSL-648RE ~ YSL-648S ~ YSL-648S(2) ~ YSL-648SE ~ YSL-682 ~ YSL-682G ~ YSL-684 ~ YSL-684G ~ YSL-872