Online Parts Store › Nylon Insert Locknut - Stainless M8-1.25 Image 1 of 1 Nylon Insert Locknut - Stainless M8-1.25 $21.16 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #14 x 2-1/2" $57.69 Phillips Tapping Screw - Pan Head, #14 x 2" $45.91 Nylon Insert Locknut - Stainless 1/4-20 $27.84 Phillips Self Drilling Screw - Pan Head #10 x 1" $41.63 Stainless Fender Washer 1/4", .062" Thick, OD 1-1/2 $103.98