Differential Ring Gear Bolt
Fits Rear Differential; GM 8.5", Ring Gear Bolt; Left Hand Thread, -7/16-20UNFor Front Differential; GM 8.25"; IFS, Ring Gear Bolt; Left Hand Thread, -7/16-20UNFor Rear Differential; GM 8.6", Ring Gear Bolt; Left Hand Thread, -7/16-20UNF