Brand New Aftermarket Female Flat Face Coupler Part Number: AT406475 Compatible With 4BD4FH Manifold Block (48mm Thread Diameter) All standard 1/2″ Body ISO 16028 Couplers John Deere Loader(s): 320E, 323E, 328E, 326E, 329E, 332E, 318E, 333E, 319E Parts can vary depending on the serial number of the machine. To check to see if this coupler will fit your machine, you will see a FFH or FH stamped onto the manifold block. The outside thread diameter of this coupler is 48mm (1-7/8″). This coupler will not fit the older manifold FFI or FI.