Federal 301P-2 Snap Gauge Micrometer Dial Indicator Assembly Unit

The Federal 301P-2 Snap Gauge Micrometer Dial Indicator Assembly Unit combines a snap-gauge micrometer with a B21 dial indicator to deliver fast, repeatable measurements with a tolerance of 0.0001 inch. Designed for precision inspection in manufacturing, toolmaking, and quality-control environments, this complete assembly provides a single-readout solution for gauging small features on machined parts. The snap-gauge micrometer design supports rapid engagement and release, helping to streamline measurement workflows on busy shop floors, while the accompanying B21 dial indicator offers a clear analog readout to verify each measurement. Ideal for inspecting small features such as pins, shafts, or other precision components that require tight tolerances, this Federal assembly is built for professional metrology tasks that demand accuracy and durability in routine use. The integrated configuration ensures a consistent, repeatable measurement process across operators and setups, making it suitable for calibration work, first-article inspections, and ongoing process control in a manufacturing or tooling environment.