Specifications: 10 of 6-32 x 3/16" 10 of 3/8"-16 x 3/8" 30 of 5/16"-18 x 3/8" 20 of 5/16"-24 x 3/8" 10 of 3/8"-24 x 3/8" 10 of 3/8"-16 x 1/2" 10 of 10-24 x 1/4" Contains 190 pieces Includes the following: 20 of 5/16"-18 x 1/2" 20 of 1/4"-20