Fordd FE VALVE COVER BOLT SETFITS ALL 352 360 390 406 427 428 ENGINES.BOLTS ARE 5 16"- 18 THREAD PITCH.SET OF 10 TRIPLE CHROME plateeD HEX HEAD BOLT KIT.THESE BOLTS HAVE A STUD WITH Phillipss HEAD ON ONE END AND A HEX HEAD STUD foP TO CORRECTLY TIGHTEN VALVE COVER DOWN.