SPI 14-654-8 0.25in 0.001in Flat & Lug Back Dial Drop Indicator

The SPI 14-654-8 is a new balanced-dial drop (plunger) indicator with a 0.25 in (6.35 mm) total measuring range and 0.001 in graduation, displaying 0–100 on a white dial face with a revolution counter tracking full 0.1 in per revolution cycles. The indicator ships with a centre lug back and flat back mounting, a tungsten carbide ball contact point anvil, and a certificate of calibration traceable to national standards (ASME B89.1.10M), as confirmed by the included inspection certificate visible in the product photos. The body is manufactured in India and housed in a molded red plastic case; the 8 mm stem shank is compatible with standard AGD-style indicator holders, magnetic bases, and transfer-fixture arms. Calibration data on the certificate shows uncertainty of 0.18 thou with one-revolution error within ±1.0 thou spec and hysteresis within 0.33 thou spec, confirming production conformance for layout, inspection, and surface-plate work. Product Specifications Brand SPI MPN 14-654-8 Indicator Type Drop (Plunger) Dial Indicator Measuring Range 0–0.25 in (0–6.35 mm) Graduation (Resolution) 0.001 in Dial Reading 0–100 (balanced white dial) Travel per Revolution 0.1 in Revolution Counter Yes Back Type Flat & Centre Lug Back (both included) Contact Point Tungsten carbide ball anvil Calibration Standard ASME B89.1.10M Certificate of Calibration Included (traceable to national standard) Stem Shank Diameter 3/8 in (9.5 mm) Dial Face Color White Country of Origin India Case Molded red plastic storage case