Thomas Machine & Foundry > Fraser Marine Products > Inspection Hatch Round Inspection Hatch Round Inspection Hatch Round Round marine grade aluminum inspection hatch with cast-in non-skid surface. Economical screw-down style with stainless steel fasteners. Weld or bolt down for long service. View Round Hatch Drawing Request A Quote Back to All Products Get in TouchWhether you need casting, precision machining, or finishing services, Thomas Machine & Foundry is here to help. Request A Quote