96204LW by Midland | AWWA C508 Swing Check Valve with Outside L/W | Size: 4" | Ductile IronPart Number Part Material 1 Valve Body Ductile iron 65 45 12 2 Seat ASTM B62 C83600 3 Disc Ductile iron 65 45 12 4 Disc Seat Ring NBR 5 Retainer Washer Ductile iron 65 45 12 6 Washer AISI 304 7 Bolt AISI 304 8 Stud ASTM B62 C83600 9 Roll Pin AISI 304 10 Roll Pin AISI 304 11 Nut ASTM B62 C83600 12 Washer ASTM B62 C83600 13 Flat Key AISI 304 14 Clapper Arm Ductile iron 65 45 12 15 O Ring NBR 16 Bonnet Ductile iron 65 45 12 17 Bolt AISI 316 18 Bolt AISI