Cap Screw Kit / 130 Piece KitPack Size:1NHC 287-1811, EG/F1 9216205 10 of 5/16"-18 x 1 1/2", Includes the following:, 65 of 5/16"-18 nuts, Contains: 130 pieces, 20 of 5/16"-18 x 1/2", 20 of 5/16"-18 x 1", 10 of 5/16"-18 x 2", 5 of 5/16"-18 x 2 1/2", Grade 5