Comparison : Item # HNSL-100-08-P, 1-8 Slotted Hex Nut Plain (10 Per Box)
Item # HNSL-050-13-P, 1/2-13 Slotted Hex Nut Plain (25 Per Box)
Item # HNSL-050-20-P, 1/2-20 Slotted Hex Nut Plain (25 Per Box)
Item # HNSL-025-20-P, 1/4-20 Slotted Hex Nut Plain (100 Per Box)
Item # HNSL-025-28-P, 1/4-28 Slotted Hex Nut Plain (100 Per Box)