What tool is used to identify the thread size of a bolt?
Identify Diameters, Thread Pitch and more on almost any Fastener with a Measuring Gauge. Size gauges for fasteners in inch and metric sizes. Sizing gauges for standards in nuts, bolts and screws. SAE and Metric displays and coarse (UNC) and fine (UNF) standards included for a thorough coverage of thread types.

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