JoblikeBrez TG300 Thread Checker, 60 Gauges, 6061 Aluminum, Inch and Metric

Made from 6061 aluminum with an anodized finish, the JoblikeBrez TG300 combines nut and bolt thread checking with drill and screw sizing in a wall-mountable gauge. Its 60 gauges cover 20 standard sizes, 20 metric sizes, and 20 drill/screw sizes, giving a workshop a single place to identify a broad range of common hardware.

Laser-etched markings, rulers on both sides, and a choice of hanging or tabletop placement make it practical to keep close to a workbench. Match a fastener to the corresponding gauge to identify its size and pitch before choosing replacement hardware or sorting loose parts.

What to know

The checker covers metric threads from M2 x 0.4 to M16 x 2.0 and imperial threads from #2-56 coarse to 5/8-18 fine. Its design includes male and female thread gauges for checking nuts, washers, bolts, and screws. The product is described as CNC-machined to meet the Go & No-Go Class 2B ANSI standard, supporting a defined approach to checking internal and external threads.

The dual-sided layout also incorporates 15CM and 6-inch rulers, so measurements are available alongside the thread and drill/screw gauges. Laser-etched labels help identify the appropriate position as you compare a fastener, while the anodized aluminum construction provides a sturdy format for regular workshop use.

Buyers often highlight how straightforward it is to identify bolt and nut sizes, as well as the easy-to-read size markings and useful range of thread pitches. For a repair, that means you can place an unknown fastener against the gauge instead of relying only on visual estimates or keeping a separate thread reference and ruler at hand.

Who it’s for

This gauge suits home workshops, repair benches, and anyone who regularly sorts or replaces nuts, bolts, screws, and drill sizes. It is particularly useful when hardware has been separated from its original packaging: check the thread and size at the bench, then use that information to select a matching fastener. For occasional measuring of one known bolt, a basic ruler may be enough, for mixed hardware and repeated identification, a combined thread checker offers a more organized reference.

Getting the most from it

Place the checker on a stable work surface using its four anti-slip silicone feet, or hang it by the mounting hole where the size labels are easy to see. Match the hardware to the corresponding gauge and use the ruler when a length measurement is also needed. Keeping the checker near the area where you sort or install fasteners makes it easier to consult the same reference during a project.

Use the metric or standard thread positions that correspond to the fastener you are checking, and consult the etched size and pitch labels to distinguish similar-looking hardware. The drill/screw gauges add a separate reference for those sizes, so the plate can support several common identification tasks without switching between multiple tools.

Should you buy it?

Choose the JoblikeBrez TG300 if you want a dedicated, wall-mountable reference for identifying standard and metric nuts and bolts, plus drill and screw sizes. Its broad gauge selection, etched markings, dual-sided rulers, and flexible placement make it a practical fit for a workbench where hardware needs to be identified and organized as projects move along.