AIRBUS CALIBRATION BLOCK SET-99D57004001000 (Metric Version) TITANIUM Airbus A318/A319/A320/A321 Calibration Block Set. 51-63-03-Pb1 Pages 4&5, Figure 51-63-03-991-002-A Sheet 01 And Figure 51-63-03-991-002-A Sheet 03. BLOCK CONTAINS 3 PLATES OVERALL DIMENSION - 190mm (L) X 150mm (W) TOP PLATE THICK - 2mm MIDDLE PLATE THICK - 12.5mm BOTTOM PLATE THICK - 2mm CONTAIN (20) HOLES – Ø6.32mm, 6.75mm, 7.14mm, 7.54mm, 7.94mm, 8.33mm, 8.73mm, 9.13mm, 9.53mm, 9.92mm, 10.32mm, 10.72mm, 11.11mm, 11.51mm, 11.91mm, 12.3mm, 12.7mm, 13.1mm, 13.49mm 13.89mm. MIDDLE PLATE CONTAIN 2 CORNER NOTCH FOR EACH HOLE (20) TOP NOTCH - 0.5mm (D) X0.15mm (W) (20) BOTTOM NOTCH - 0.15mm (D)X0.15mm (W) (6) BOLT & NUT DIA -6.5mm STANDARD/MANUFACTURE REFERENCE/PART NUMBER: 99D57004001000 MATERIAL: TITANIUM. NOTE: For special alloy request by mail.