Yukon Gear & Axle (YSPBLT-019) Ring Gear Bolt For GM 7.5", 7.6", 7.6" Irs, 8.0", 8.25" Ifs, 8.5", 8.6" & 8.6" Irs. 7/16" X 20. 1 Year Warranty High Quality Small Parts Engineered to Fit Specific Differential Applications