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Wall mounted thread checker grainger.
Starting from the top you have 28 female threaded holes to identify common inch metric bolt sizes following that you ll find 28 male threaded studs to identify nut sizes and at the bottom you ll find screw diameter bolt length checkers.
The thread checker is an accurate and easy to use thread verifier for both nuts and bolts.
Conveniently assembled onto a wire loop it is especially well suited for distinguishing between similar inch and metric threads.
Thread sizes are permanently stamped onto each gauge.
The wall mounted thread checker quickly identify the most common size nuts bolts in one easy to display center.
Mount to a wall for easy access and thread your fastener into holes or onto plugs for quick and accurate size identification.
Screw size identifiers find thread size screw size thread pitch diameter and drill bit size with one tool.
Each size has a nut and bolt checker on the same gauge.