Thread Gauge - Inch Sizes
Nuts, Bolts & Screws Measuring & Identification Tool
Thread Gauge Standard - Identify size and pitch of machine screws, nuts and bolts with this solid steel thread checker. This simple tool offers knobs and slots of standard fastener sizes from #6-32 through 1/2"-20. Screw a fastener into the slot to determine the thread pitch and size. Nuts and Washers can be measured by using the knob on the opposite end of each piece. Convenient design for easy storage and transportation.
Includes UNC and UNF sizes