Online Parts Store › Nylon Insert Locknut - Stainless 3/4-10 Image 1 of 1 Nylon Insert Locknut - Stainless 3/4-10 $53.60 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #6 x 3/8" $9.01 Stainless Fender Washer #8, .050" Thick, OD 3/4" $21.67 Carriage Bolt, 1/2"-13 x 3" $92.78 Square Tapping Screw - Flat Head,#8 x 1-1/2" $31.67 Phillips Tapping Screws - Flat Head, #6 x 3/4" $10.33