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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Starrett Small-Bore Gauges

Half-Ball Gauge
Insert into small bores, slots, grooves, and recesses and turn the knob on the handle to expand the contacts. To find the bore diameter, use a micrometer to measure the distance across the contacts.
Half-ball gauges are best for flat, shallow areas.
Measuring Range | Max. Dp. Measured | Material | Manufacturer Model Number | Each | |
Half Ball | |||||
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0.3"-0.4" | 3" | Steel | 831C | 000000 | 000000 |