M3-M18 Metric Thread Gauge Stainless Steel Screw Pitch Caliper

M3–M18 Stainless Steel Metric Thread Gauge — Precision at Your Fingertips

Whether you're a seasoned mechanic, a DIY enthusiast, or a professional engineer, having the right measuring tool makes all the difference. This M3–M18 Metric Thread Checker is crafted from premium 304 stainless steel for lasting durability and consistent accuracy across every job site, workshop, or field repair scenario.

Key Features

• Long-Lasting 304 Stainless Steel Construction: Built to withstand demanding work environments, this thread gauge delivers robust wear resistance and maintains stability over extended use.
• 2-in-1 Measurement Solution: Integrates dual-measurement functionality in a single tool, covering a versatile M3–M18 specification range so you can efficiently handle multiple fastener types without switching tools.
• High-Precision Etched Scale: Double-scale visibility with crisp numerical markings and high-precision etching minimizes measurement inaccuracies and boosts reading clarity every time.
• Ergonomic Anti-Slip Caliper Shape: Engineered with anti-slip properties and a comfortable caliper-style grip, reducing hand fatigue during repetitive thread gauge inspections and streamlining your workflow.
• Cross-Industry Versatility: Ideal for rapid model matching across a wide range of bolt, nut, screw, and fastener types — perfect for automotive, construction, manufacturing, HVAC, home repair, and more.
• Compact & Portable: Measures approximately 10 × 5 cm (3.94 × 1.97 in), making it easy to slip into a toolbox, apron pocket, or kit bag for on-the-go use.

Specifications

What Can You Measure?

This thread gauge is designed to quickly and accurately identify the pitch and size of metric bolts, nuts, screws, and threaded rods from M3 through M18. It's an indispensable addition to any toolbox — from professional repair shops to home garages.

Notes

• Due to different lighting and display settings, the item color may vary slightly from the photos.
• Manual measurements may result in a ±1–2 mm tolerance in size.

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Frequently Asked Questions

Q: What thread sizes does this metric thread gauge cover?

A: This thread gauge is designed to measure metric threads from M3 to M18, making it suitable for a wide variety of bolts, nuts, screws, and threaded fasteners used in automotive, construction, home repair, and industrial applications.

Q: Is this thread checker suitable for both professional and home use?

A: Absolutely. Its compact, portable size and ergonomic anti-slip design make it convenient for professional workshops, home garages, and on-site field repairs alike. The dual-scale measurement means you can quickly identify fastener sizes without needing multiple tools.

Q: What material is the thread gauge made from?

A: The thread gauge is constructed from high-quality 304 stainless steel, offering excellent corrosion resistance, durability, and long-term dimensional stability even under demanding working conditions.

Q: How do I read the measurements on this gauge?

A: Simply align the bolt, nut, or screw thread into the corresponding slot on the caliper. The high-precision etched double-scale markings clearly display the metric pitch and size, allowing for fast and accurate identification with minimal effort.

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.