BSI - BS 1734
Specification for Micrometer Heads
|Publication Date:||16 April 1951|
|ICS Code (Measuring instruments):||17.040.30|
Heads for assembly with measuring or machine tools. Three types, thimble diameters below 1 in, 1 in and below 2 in, 2 in and over; measuring ranges 1⁄2 in, 1 in, 13 mm, 25 mm. Material, micrometer screw, spindle, thimble and barrel adjustments, measuring faces and graduations, dimensions and standards of accuracy.