Machined Spindle MT and PT Exam Flawed Specimen (Metric Version) Carbon Steel Machined Spindle MT and PT Exam Flawed Specimen Machined Spindle magnetic particle/Liquid Penetrant Exam flawed specimens.(MT,PT) Geometry: 1.75"OD x 8" long. Flaws: 3, randomly placed Standard Tolerance: +/-0.150" (4mm). Documentation: NDT Verification Reports, C of C, CAD Drawings and Test Sheets. Material: Carbon Steel. Customized Calibration Test Block and Flaw Specimen also available.