No. 230 Series Outside Micrometers
This is the jewel of precision micrometers used by
skilled workmen worldwide.
The spindle and anvil are sized at .235" (6 mm) to reach places most micrometers cannot reach.
Readability Features
- Starrett satin chrome finish – no glare – resists rust Advanced sleeve design with staggered lines and distinct figures for precise and easy readability Quick-reading figures – every thousandth numbered on Inch tools
- Convenient decimal equivalents on Inch tools
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Top-to-bottom: Model 230 and 230M

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