Inch & Metric Thread Gauge – Bolt & Nut Size Measuring Tool

$53.51 $60.48

Shipping calculated at checkout.

Identify Threads in Seconds – Inch & Metric All-in-One

Stop guessing thread sizes on your next project. This Red Multifunctional Thread Check Gauge lets you quickly identify both Imperial (inch) and Metric bolt and nut sizes with a single compact tool. Made from durable, high-hardness plastic, its slots are precision-formed — smooth and burr-free — so you get accurate readings every time without damaging your hardware.

Whether you're a professional mechanic, a dedicated woodworker, or a DIY enthusiast, this portable thread measuring gauge belongs in every toolbox. Made in Mainland China.

Key Features

Dual System Coverage: Reads both Imperial (inch) and Metric thread sizes on a single gauge
Wide Size Range: 13 Imperial bolt sizes (#4–3/4") + 13 Metric bolt sizes (M3–M22) + 10 nut sizes
High Accuracy: Precision-molded slots deliver consistent, reliable thread identification
Burr-Free Finish: Smooth edges protect threads and ensure clean, easy fitment checks
Compact & Portable: Slim 0.4 cm profile, approx. 22.1 × 8.5 cm — fits in a pocket or tool pouch
Durable Plastic Construction: High-hardness, stable-performance material built to last
Bold Red Color: Easy to spot in a crowded toolbox

Specifications

Material	Plastic (High-Hardness)
Color	Red
Dimensions	Approx. 22.1 × 8.5 cm / 8.7 × 3.4 in
Thickness	Approx. 0.4 cm / 5/32 in
Imperial Bolt Sizes	#4, #5, #6, #8, #10, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 3/4
Metric Bolt Sizes	M3, M4, M5, M6, M7, M8, M10, M12, M14, M16, M18, M20, M22
Nut Sizes	#6, #8, #10, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8
Package Contents	1 × Thread Check Gauge
Country of Origin	Made in Mainland China

Note: Please allow 2–3% variance due to manual measurement. Actual color may vary slightly from images due to monitor settings.

Frequently Asked Questions

Q: What thread sizes does this bolt and nut thread gauge cover?

A: This multifunctional thread measuring gauge covers 13 Imperial bolt sizes (#4 through 3/4"), 13 Metric bolt sizes (M3 through M22), and 10 Imperial nut sizes (#6 through 5/8"), making it one of the most comprehensive portable thread gauges available for both inch and metric fasteners.

Q: Is this thread gauge suitable for both professional and DIY use?

A: Absolutely. Its high-accuracy, burr-free precision slots make it reliable enough for professional mechanics and tradespeople, while its simple design and compact size make it equally perfect for home DIY projects, woodworking, and general hardware tasks.

Q: How do I use this thread check gauge?

A: Simply slide the bolt or nut into the labeled slots on the gauge until you find a snug, flush fit. The slot label indicates the exact thread size. No special skills or additional tools are required — identification takes just seconds.

Q: Is the gauge durable enough for workshop use?

A: Yes. The gauge is constructed from high-hardness, high-density plastic with a stable, sturdy texture. It is designed for repeated use in workshop environments and maintains its accuracy over time.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.

We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.