Technical Data:
Series: 148
Product type: Micrometer Head, Fine Spindle Feed of 0.25 mm/rev
Feature: Fine spindle feeding for fine adjustment and positioning
Spindle pitch: 0.25 mm/rev
Measuring face material: Alloy tool steel
Measuring-face hardness: 60 HRC or more
Measuring face: Lapped
Finish: Satin-chrome plated
Measuring range: 0 - 6.5 mm
Graduation: 0.01 mm
Stem diameter: 9.5 mm
Stem: With clamp nut
Spindle end: Spherical SR4
Accuracy: +/-2 um

Dimensions:
Spindle Dia.=6.35 mm
Stem Dia.=9.5 mm, tolerance 0/-0.009 mm
Locknut outside/reference Dia.=14 mm
Locknut thread=M9.5x0.5
Fixture thickness=6 mm
Body Dia.=15 mm
Spherical spindle end=SR4
Reference dimensions=9.5 mm; 18.5 mm; 23.5 mm
Retracted reference dimensions=12 mm and 30 mm
Mass=35 g
Parenthetical dimensions apply with spindle fully retracted