124AZ Starrett Inside Micrometer 2-8* Range, .001* Grad, 6 Rods, One 1/2* Head, Case

124AZ

These are the most popular inside micrometers because of
their lightness, ease of use, and range. They are very useful for
measuring inside diameters of cylinders and rings, measuring
parallel surfaces, etc.
The desired range is obtained by assembling rods and spacing
collars to the micrometer head. Measuring rods are provided with a
shoulder that is set accurately in the micrometer head and locked
in position. When assembling rods to the A and B heads, the reading
line on the micrometer head should be lined up with the marking on
each rod (except for the 2-3″ and the 50-75mm rods).
Rod diameters are approximately 1/4″ (6mm) on the A and B
sizes, and approximately 11/32″ (8.5mm) on the C size. Each rod
has individual length adjustment for the anvil by means of special
wrenches furnished.

• Measuring rods are solid and assembled on one side of the
  micrometer head
• Insulated rods marked with length
• Hardened and ground anvils on rods, adjustable for length.
• Head anvil is hardened and ground
• Quick-reading figures – every thousandth numbered on inch
  reading tools
• A 6-1/2″ (165mm) long convenient handle is available to
  provide reach for use in deep holes. Handle screws into the
  micrometer head in place of the dummy screw, which is
  opposite a rod lock screw