Complex sentence: These are similar except for the thread angle 60 °, the size of the bolt head, and a different the thread pitch for the 1/2 bolt, 12 tpi in BSW vs 13 tpi in the AUC.
Split into simpler sentences: These are similar except for the thread angle 60 ° and the size of the bolt head. There is one important exception in this comparison, the thread pitch for the 1/2 bolt is 12 tpi in BSW vs 13 tpi in the AUC.