78958 Type: Coolant Through Adapter Size: #3 (1.888) Tap Size Range: 3/4 & 1 PIPE TAP Tap Size: 3-4 Tap Shank Dia.: 0.906 in Tap Shank Square: 0.679 in Length: 0.43 in Diameter: 2.75 in Depth Tap Enters: 1.55 in A- Length B- Diameter