Comparison : Item # S11T0005, 18-8 Stainless Steel Thin Nylon Insert Lock Nuts, National Coarse
Item # S11T0010, 18-8 Stainless Steel Thin Nylon Insert Lock Nuts, National Coarse
Item # S11T0015, 18-8 Stainless Steel Thin Nylon Insert Lock Nuts, National Coarse
Item # S11T0020, 18-8 Stainless Steel Thin Nylon Insert Lock Nuts, National Coarse
Item # S11T0025, 18-8 Stainless Steel Thin Nylon Insert Lock Nuts, National Coarse