Proto® torque adapters are designed with a center-to-center dimension of 2 in. This means that the distance from the center of the square drive of the mating torque wrench to the center of the fasteners is exactly 2 in. This constant dimension serves to simplify the process of calculating the torque applied.

Proto® Torque Adapter, Imperial Wrench Opening Type, 3/8 in Drive, 1/2 in Wrench Opening, 2-25/32 in Overall Length, 12 Points, Alloy Steel, Full Polished

• Designed for easy torque calibrations
• Adapters measure 2 in from the center of the square drive to the center of the adapter opening
• Special heat treated alloy steel helps to increase strength and durability
• Box end wall thickness is specially engineered to provide strength while still allowing ample room for access to reach difficult fasteners
• 12 point box end allows for fine indexing, helping to improve speed and access
• Fits 4, 6 and 12 point fasteners

• Catalog https://assets.unilogcorp.com/2/ITEM/DOC/Proto_J6104A_Catalog.pdf