TB Wood's 8S178 Sleeve Coupling Flange, 8 Coupling Size, 4, 500 RPM Max Speed, 5 29 64 in Outside Dia, Inch G5128646 2 6 A Frame 184T Usable 2 6 A Frame 184T Usable @ 208V Yes Usable @ 200V No Hz 60 Hz Motor Service Factor 1 Replacement parts are interchangeable with other standard brands of reversible chain tongs and are packaged and labeled for the customer’s convenience in getting correct and genuine PETOL TITAN parts 09 in Length through Bore 2 3 32 in Hub Diameter 3 1 4 in Outside Diameter 5 29 64 in Bore Diameter 1 7 8 in Keyway Depth 1 4 in Coupling Size 8 Screw Thread Size 3 8" 16 Hub Body Length 3 4 in Keyway Width 1 2 in Item Sleeve Coupling Flanges Sleeve Coupling Flange Flange Type Sleeve Couplings S Bore Type Couplings Fixed Bore Setscrew Location One Over the Key and One at 90 Degrees Max 1 Degrees For EPDM & Neoprene Sleeves Bushing Required None Max