Outside thread pitch is 1/2"diameter x 20tpi.
We offer a variety of different sized Case Saver Inserts to meet all needs. Case Saver Inserts are a must when rebuilding your VW engine case. Most times you will find the original threads in the engine case have been pulled out. Installing Case Saver Inserts repairs the damaged threads and replaces the old weak threads so you wont have studs pulling out down the road.