Used on general dynamics no. 20-192 heat exchanger. 20.750" outside diameter double jacketed graphite filled with 1/4 in. center line rib gasket 1/4 in. wide center line rib circular
Used on 2540-01-559-0155, tractor armor kit. sponge gasket shape rectangle; length 22.000" nom; width 13.000" nom; has 12 mounting holes, two each along top