Starrett Inside Hole Micrometers
Find the inside diameter of cylinders and rings. These micrometers have a plain thimble, which relies on operator feel for accurate measurements.
124 series have solid steel extensions that attach at one end of the micrometer head. Handles (sold separately) screw into a micrometer head to extends its reach for measuring deep holes.
Micrometers

124 Series
Measuring Range | Accuracy | Measuring Increments | Material | Number of Extension Rods | Extension Rod Dia. | Number of Heads | Head Travel | Manufacturer Model Number | Each | |
124 Series—Plain Thimble | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
2"-32" | ±0.0001" | 0.001" | Steel | 10 | 1/4", 11/32" | 2 | 1/2", 1" | 124DZ | 000000 | 000000000 |
Accessories

Handle
Handle Lg. | For Manufacturer Model Number | Each | ||
Handle | 6 1/2" | 124AZ, 124BZ, 124DZ | 000000 | 000000 |