Thread Checker – 14 SAE & 14 Metric Bolt Identifier Gauge
Thread Checker – 14 SAE & 14 Metric Bolt Identifier Gauge
Thread Checker with 14 SAE & 14 Metric Sizes — Nut & Bolt Identifier Gauge
Stop guessing and start measuring with confidence. This professional-grade Thread Checker identifies 28 different thread sizes in seconds — covering both metric and imperial (SAE) fasteners. Whether you're a plumber, mechanic, auto repairer, handyman, or DIY enthusiast, this compact aluminum alloy tool is the one gauge your toolbox has been missing.
Key Features
- Comprehensive 28-Size Range: Covers metric threads from M4 × 0.7 to M14 × 2.0 and imperial threads from #6-32 fine to 1/2-20 fine — all in a single, easy-to-use tool.
- ANSI 2B Go/No-Go Verified: Precision-machined from high-quality aluminum alloy metal to meet strict ANSI 2B go/no-go standards, ensuring lasting accuracy and reliable identification every time.
- Bilingual Scale Markings: Features both inch and centimeter scales along the edges for quick, clear, and enduring measurements — no conversion tables needed.
- Efficient Fastener Sorting: Instantly sort and identify mixed nuts, bolts, and screws. Ideal for organizing hardware bins, sorting job-site fasteners, and speeding up any repair or assembly project.
- Versatile & Portable: Wall-mountable or toolbox-ready. At just 260 × 80 × 20 mm (approx. 10.24 × 3.15 × 0.79 in), it fits anywhere and goes everywhere your work takes you.
- Built for Professionals & DIYers: A must-have for plumbers, mechanics, auto repairers, machinists, and any hands-on professional who works with fasteners regularly.
Specifications
| Material | Aluminum Alloy Metal |
| Metric Sizes | M4 × 0.7 to M14 × 2.0 (14 sizes) |
| SAE / Imperial Sizes | #6-32 Fine to 1/2-20 Fine (14 sizes) |
| Total Thread Sizes | 28 |
| Standard | ANSI 2B Go/No-Go |
| Dimensions | 260 × 80 × 20 mm / 10.24 × 3.15 × 0.79 in |
| Country of Origin | Made in China |
What's in the Box
- 1 × Thread Checker / Bolt Identifier Gauge
Note: Due to monitor settings and lighting conditions, the actual color may vary slightly from product images. Please allow a 1–2 cm tolerance due to manual measurement.
For more information on fastener standards and thread identification best practices, visit the National Institute of Standards and Technology (NIST), the authority on U.S. measurement standards and industrial tolerances.
Frequently Asked Questions
Q: What thread sizes does this thread checker identify?
A: This thread checker identifies 28 total sizes — 14 metric (M4 × 0.7 through M14 × 2.0) and 14 SAE/imperial (#6-32 fine through 1/2-20 fine), making it highly versatile for a wide range of fastener identification tasks.
Q: What material is the bolt identifier gauge made from?
A: The gauge is precision-machined from high-quality aluminum alloy metal, ensuring durability and long-lasting accuracy that meets ANSI 2B go/no-go standards.
Q: Can I mount this thread checker on a wall in my workshop?
A: Yes! The thread checker is designed to be wall-mountable for easy workshop access, or compact enough to store in a standard toolbox — making it practical for both fixed workstations and mobile job sites.
Q: Is this tool suitable for professional use?
A: Absolutely. This screw size checker is used by mechanics, auto repairers, plumbers, machinists, and other trade professionals who need fast, accurate fastener identification on the job.