Mahr Federal 40A Series 4134904 Micrometer; 4-5" Range

The Mahr Federal 40A Series 4134904 Outside Mechanical Micrometer has a measuring range of 4-5" with .0001" Graduations, .00024" Error Limit and a .025" Spindle thread pitch. Features include a hard, lacquered steel frame for measuring ranges up to 75-100mm/3-4". The spindle and anvil are made of hardened steel and carbide tipped with satin-chrome finished scales, heat insulators, an integrated ratchet with rapid drive and a locking device. Supplied with a case and a setting standard.