Case Saver Inserts, 12X8mm-16 Pieces

Case Savers, 12 x 1.5mm OD x 8 x 1.25mm ID, 16 Pieces, 4562 are used to make the thread engagement of the small steel head stud much stronger where it goes into the soft magnesium engine case. This keeps the proper expansion characteristics of the small stud, but with the strength of a larger thread.