Nut and Bolt Thread Checker 28 Thread Identifier Gauge Inch and Metric Screw
1x Nut and Bolt Thread Checker. For Identify 28 Different Size Bolt, Nut, Screw Threads. Machined to high accuracy to ensure each bolt and thread conforms to standard gauge. Standard Thread Sizes: from 6-32 Fine to 1/2-20 Fine.