Listing ID #3093489
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Contact SupplierNavships test block 1018 steel (navy version 3020) geometry: contains six 364" diameter side-drilled through-holes at distances of .250" to 2.750" in .250" increments, and an additional near-surface hole at .125". In accordance with navsea tech pub #t9074-as-gib-010271, figure 19. Used for distance amplitude correction, sensitivity levels and flaw depth information.