ISF3.8 Cummins Valve Spring 3926700 Parts Catalog Ref No. Part Name Part No. Required Pipe Plug 3008468 3 Pipe Plug 3008469 1 Hexagon Flange Head Cap Screw 3920779 6 Hexagon Flange Head Cap Screw 3920780 14 Cylinder Head 3922739 1 Pipe Plug 3008468 1 Valve Collet 3900250 24 Valve Spring  3900276 12 Pipe Plug 3906619 2 Valve Stem Seal 3921640 …