Internal Groove Micrometers by Starrett
No. 701 Series (.500-2.500")
Measures grooves for retaining rings and "O" rings, oil grooves, washer grooves, as well as bores and recesses. Depth of grooves up to 5/64" can be measured with No. 701A; and 7/32" with No. 701B. Tool is accurate to ±.0002".
- Hardened and ground gaging contacts are .030" thick
- Contacts have flush ends to gage grooves at the bottom of blind holes
- Satin chrome reading surface is glare free and resists rust
- Smooth friction thimble for consistent readings
- Lock screw
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Gaging contacts are only .030" thick.
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