I've got five of these STM things. They're anodised alu and have "003YAM109   N.34b-2003" on them.
  I think they're like a clutch pressure plate stabiliser thingy, like on this page: 
http://www.madduc.com/showproduct.as...8&categoryid=5  Can't find anything about them on the STM site or on the intarweb. 
 Anyone got any idea?