Whether you’re trying to identify loose screws or you just want to figure out which nuts and bolts to use where, the Thread Detective is the perfect tool. Available in standard or metric, it features clearly marked gauges for quick identification of bolt size, nut diameter and thread pitch. Standard gauges are black with 14 measuring gauges. Metric gauges are red with 11 measuring gauges. Includes heavy-wire lanyard and handy inch/mm ruler for measuring studs.
Standard (Black) Thread Detectives include the following thread gauges:
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Thread Detective Screw Gauge, Standard
Thread Detective Screw Gauge, Metric