Janome Overlock Needle Clamp Body HOLDING SCREW
134D MyLock, 204D MyLock, 234, 234D, 304D, 334, 334D, 434D, 504D MyLock, 534, 534D, 634D MyLock, 644D
This is the small black holding/fixing screw for the needle clamp body 785004020 to the needle bar
Part No. 785026017 Genuine Janome Part