Extreme Max (NN 1/2) 1/2" Tall Aluminum Snowmobile Stud Nut with Nyloc Insert, (Pack of 48) Lightweight stud support for longer studs 6061 T-6 aluminum heat treated construction 5/16 inches - 24 thread size with nylon inner lock washer 48 Pack of 1/2 inches nyloc nuts Two Year no Bend/Break Warranty