Three Link Grade Eight Hardware 5/8"-11 x 4" Includes Grade Six 5/8"-11 x 4" Yellow Zink Bolts Two Grade Eight 5/8"-11 x 3 1/4" Yellow Zink Bolts and Eight 5/8"-11 Nylock Nuts. This kit is used for three link suspensions that need a 5/8" bolt and use a suspension joint that has a 2.625" mounting width.