
21-890-9 SPI Hole Mike Set .275" - .500" w/ Cert
SPI Hole Mike 3-Point Internal Micrometer Set
Specifications Include...
- 0.275" - 0.500" Measuring Range
- 0.0001" Readings
- 2.00" Measuring Depth
- Includes Setting Rings
- Includes 4" Depth Extension
- Includes Certificate of Calibration
Features include...
- Three point internal micrometer for precise, direct measurement of bore diameters.
- Self aligning and self centering
- Carbide measuring anvils
- Suitable to measure to within .050" of bottom of blind hole, up to 4" capacity
- Feelers taper toward the back for positive reading of the front edge
- Ratchet stop provides uniform measuring pressure