TAM Crack ComparatorCrack comparators are used to measure the actual size of indications identified during the liquid penetrant inspection process. Pratt & Whitney Crack Comparator Measures indications in increments between 0. 010" and 0. 180" (0. 2 mm 4. 6mm) and meets Pratt & Whitney requirements (P&W Reference TAM 135273) Key Features Precision Measurement: Graduated scale from 0. 010" to 0. 180" (0. 2 mm 4. 6mm) for accurate crack sizing Pratt & Whitney Standard