Navships Test Block

Used for distance amplitude correction, sensitivity levels and flaw depth information.Inch Contains six 3/64 diameter side-drilled through-holes at distances of 0.25 to 2.75 in 0.25 increments. MTDs are engraved near both scan edges on one face. In accordance with MIL-STD-271G Figure 9, and NAVSHIPS Specification 0900-006-3010/Section 6. Also known as a Mare Island block. This block is surface ground to a 32 Ra finish on all surfaces, and the steel version is nickel-plated.• Dimensions: 12.000 x 3.000 x 1.250 • We also manufacture a Navy version (3020 block) with rougher scanning surfaces (125 to 250 Ra max), and an extra hole at 0.125 MTD. • Fitted wooden storage case optional...see above. Metric Contains six 1.2mm diameter side-drilled through-holes at distances of 6.25mm to 68.75mm in 6.25mm increments. MTDs are engraved near both scan edges on one face. Metric equivalent of U.S. customary block, based on MIL-STD-271G Figure 9 and NAVSHIPS Specification 0900-006-3010/Section 6. This block is surface ground to a 32 Ra finish on all surfaces.• Dimensions: 30mm x 75mm x 300mm • Metric version. • Fitted wooden storage case optional...see above. 1018 Steel, Nickel-Plated 7075-T6 Aluminum, Anodized Type 304 Stainless Steel