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 - Oval Head, #12 x 3/4" $33.07 Stainless Cotter Pin 5/32" x 1-1/4" $33.25 Stainless Cotter Pin $169.61 Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) $10.20 Flat Washer, #10, .050" Thick, OD 9/16 $16.12