Gem Bids For 3 Valve Seat Hw-293.63 -- Rough Mcd Forging As Per Drg. Hw-293.63. F With Matl. Hw19386 Rev. 03 Valve Seat Hw-284.54 -- Rough Mcd Forging As Per Drg. 31132101998. M With Matl. Hw19386 Rev. 03 Rough Machined Forging For Valve Seat Hw-290.69 -- Item As Per Drg. 41122209998 Rev. 03 With Matl.