Description Bolt kit, front axle bolt kit for tractors with bumper, contains; 2-3.4" bolts, 2-4" bolts, 4-351505S8 washers & 4 hex nuts. Tractors: 9N, 2N, 8N, NAA, 600, 800 (1939-1957). This item is a suitable alternative for the following: 350790-KIT