Manalete 55 Nut and Bolt Thread Checker, 19 SAE, 17 Metric and 19 Drill Gauges

Specifications

For mechanics, DIYers, and maintenance teams who work with both inch and metric hardware, the Manalete thread checker brings nut, bolt, and drill-bit sizing together on one board. Its marked gauge positions make it easier to identify a size before selecting a fastener or bit for an assembly, maintenance, or repair task.

The red board uses white lettering, with inch and centimeter scales along the edges. Wall-mounting holes offer a practical way to keep the gauge visible near a workbench, while its compact board format also works for handheld checks.

• Type: Wall-mounted thread checker board
• Gauge quantity: 55 total, 19 SAE, 17 metric, and 19 drill gauges
• Thread ranges: M2 x 0.4 to M14 x 2.0 metric, #2-56 to 5/8-18 standard
• Drill gauges: 6 metric sizes from 4mm to 14mm and 13 imperial sizes from 1/16" to 1/2"
• Materials: Anodized aluminum alloy board and steel bolts
• Markings: White lettering on red, with inch and centimeter edge scales
• Standard: Go/No-Go Class 2B ANSI gauging standard

Getting the most from it

For a loose nut or bolt, compare its thread with the corresponding marked gauge to identify the size, then use the result to choose a matching fastener for the job. The board covers both metric and standard threads, making it useful when a workshop or repair task involves hardware from different systems. Its range also supports checking drill-bit sizes, so the same tool can help with fastener selection and bit organization.

The laser-etched scales and contrasting markings make the size labels easy to read during routine bench work. Use the wall-mounting holes to keep the checker accessible in a garage or shop, or hold the compact board while sorting parts. For the most reliable identification, remove rust before checking a thread, broken, chipped, or severely deformed threads can make accurate sizing difficult.

Buyer feedback often highlights the tool’s usefulness, versatility, and solid construction for workshop and garage tasks. Some customers report measurement inaccuracies, and feedback on durability is mixed, including reports of bent upper prongs. These comments are useful context when deciding how the gauge fits into your own inspection and organization routine.

In the box

The listed package contains one thread checker board, combining the nut and bolt thread gauges with the drill-bit sizing positions. It provides a single reference point for common fastener and bit identification rather than requiring separate gauges for each task.

What to clarify

Can it identify both metric and standard threads? Yes. The listed thread coverage runs from M2 x 0.4 to M14 x 2.0 for metric sizes and from #2-56 to 5/8-18 for standard threads.

Can it be mounted or held by hand? The board has pre-drilled holes for wall mounting and is also described as compact enough for handheld use. Mounting it near a work area keeps the marked positions available for routine checks.

Can it size a damaged or rusty thread? Rust should be removed before checking. If the thread is broken, chipped, or severely deformed, accurate identification may not be possible.

Final verdict

This Manalete checker is suited to repair benches, garages, and maintenance work where identifying both inch and metric fasteners—and checking drill-bit sizes—are part of the routine. Its broad set of marked positions, contrasting labels, and wall-mountable board design make it a practical reference for keeping common sizing checks close at hand.