The Starrett No. 436 series represents one of the industry’s most trusted mechanical outside micrometer sets. Known for their rigid American-made craftsmanship, these sets are packaged in protective wooden cases alongside calibrating standards and adjusting spanner wrenches. They are the go-to precision measuring tools for machinists, automotive technicians, and inspection labs.Â
The micrometers offered in this set are two of the ST436.1AXRFLZ (0-1″ & 2-3″) and one ST436.1CXRFLZ (4-5″). Refer to the information below for further details.
Common Set Configuration Options
Starrett configures the 436 series into several distinct packages based on the total measuring span you require.
- 0 to 3-Inch Set (ST436.1AXRLZ): Includes three micrometers (1″, 2″, and 3″) and two calibration standards.
- 0 to 4-Inch Set (ST436.1BXRLZ): Includes four micrometers (1″, 2″, 3″, and 4″) and three calibration standards.
- 0 to 6-Inch Set (ST436.1CXRLZ): Includes six micrometers ranging from 1″ to 6″ alongside five calibration standards.
- 6 to 12-Inch Set (ST436DXRLZ): Features six large-range micrometers (7″ through 12″) accompanied by five large standards.
- 0 to 12-Inch Set (ST436EXRLZ): The master set, featuring 12 individual micrometers up to 12″ and 11 calibration standards.Â
Decoding Starrett 436 Model Suffixes
When buying a 436 set, the letters appended to the model number tell you exactly which premium features are integrated into the tools:Â
| Feature Code | Core Functionality | Benefit |
|---|---|---|
| T (Prefix) | Tenths Vernier Scale | Enhances reading resolution down to 0.0001″ |
| X | Carbide Measuring Faces | Maximizes wear resistance against abrasive materials |
| R | Ratchet Stop / Thimble | Ensures uniform measurement pressure across different operators |
| F | Friction Thimble | Smooth, one-handed slip mechanism for quick, consistent feel |
| L | Lock Nut | Knurled ring type mechanism to lock the spindle and save a reading |
| Z | Complete Case Enclosure | Indicates the item includes a protective storage case |
Build Features & Ergonomics
- No-Glare Finish: The sleeve and thimble use a Starrett satin chrome finish that minimizes surface glare under bright factory lighting and resists rust.
- Advanced Sleeve Markings: Uses distinct figures and staggered lines to help eliminate parallax reading errors.
- Tapered Frames: The frames feature a gracefully tapered design that allows you to sneak the anvil into narrow slots and tight spaces
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