Used on B-52. 4.520" outside diameter gasket is made from non-asbestos blue-gard compressed gasketing style 3000 material 1/16 thickness from garlock inc. circular
Used on B-52. 4.500" outside diameter gasket is made from non-asbestos blue-gard compressed gasketing style 3000 material 1/16 thickness from garlock inc; has .50 wide x .06 height notch in the aperture circular
Used on 3990-01-444-6174 distributor, bitum. 0.437" hole diameter 6.875" outside diameter 6 bolt hole quantity gasket flange 4 inch 3-way circular with one peripheral flat