AOWEMEA 36-Size Nut and Bolt Thread Checker, 20 SAE & 16 Metric Thread Gauge, Thread Checker Standard and Metric, Bolt Size Finder Tool for Nuts, Bolts, Screws, Wall Mounted Identifier Gauge

PRECISION THREAD CHECKER – ANSI CLASS 2A/2B TOLERANCE：Our nut and bolt thread checker complies with ANSI B1.1-2020 Class 2A/2B tolerance standards. Under ASME B18.2.2 test conditions, accuracy reaches ±0.002 inches, ensuring reliable sizing for both internal and external threads. No more mismatched hardware – just flawless accuracy.

36 SIZES – FULL SAE & METRIC COVERAGE：Identify 36 distinct sizes of bolts and nuts: 16 Metric threads from M3 x 0.5 to M14 x 2.0, and 20 Standard threads from #4-40 Coarse to 1/2-20 Fine. Each size includes both male and female threads, making this thread gauge compatible with all your standard hardware.

3 RAISED MEASURING RINGS – ENHANCED ACCURACY & STABILITY：Simply match your nuts and bolts to the corresponding slots. The 3 raised nut measuring rings are designed to optimize measurement precision – nuts sit flush and stable, eliminating the wobble common with flat boards. This thoughtful engineering ensures more accurate readings and greater stability every time you measure. Laser-etched markings stay clear, making this bolt size finder reliable for both beginners and pros alike.

SOLID METAL CONSTRUCTION – NO FLEX, JUST ACCURACY.：Built with solid metal studs, not hollow ones that flex or wear out over time. This thread checker standard and metric delivers consistent, wobble-free measurements you can trust. The durable anodized finish ensures long-lasting performance in any workshop environment.

CONVENIENT RULERS & EASY WALL MOUNTING：Features convenient 15CM and 6-inch rulers on the sides for quick length measurements. The pre-drilled hanging hole allows you to mount it on your workshop wall for easy access or keep it securely in your toolbox. A durable, reliable bolt measuring tool for everyday use.

AOWEMEA Nut and Bolt Thread Checker – Precision You Can Trust