Online Parts Store › Nylon Insert Locknut - Stainless M5-.8 Image 1 of 1 Nylon Insert Locknut - Stainless M5-.8 $15.56 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Stainless Cotter Pin 5/32" x 1" $51.08 Phillips Tapping Screw - Pan Head, #8 x 1-1/2" $25.70 Lag Screw, 3/8 x 3" $41.46 Phillips Tapping Screws - Flat Head, #12 x 3" $42.89 Stainless Countersunk Finishing Washer, #10 $14.99