Replace your factory u-bolts with these zinc plated corrosion resistant Tuff Country 17751 GM Truck/SUV u-bolts. Designed specifically for Lifted vehicles. This kit includes (4) u-bolts along with nuts and washers.Details: Rear Axle U-Bolt Kit Zinc plated to resist corrosion (4) U-bolts, nuts and washers Designed specifically for Lifted vehicles Made In The USA Sold As A Kit Fits: 1973-1987 Chevrolet 1/2 Ton 4WD 1973-1987 Chevrolet Suburban 1/2 Ton 4WD 1973-1987 Chevrolet Blazer 1/2 Ton 4WD 1973-1987 GMC Truck 1/2 Ton 4WD 1973-1987 GMC Suburban 1/2 Ton 4WD 1973-1987 GMC Jimmy 1/2 Ton 4WD Tech Specs: Bolt Diameter: 5/8 Inch Inside Diameter: 3 Inches Length: 7.625 Inches Bend Type: Round