78PCS Nut Bolt Thread Checker Set
41 SAE & 37 Metric Gauges with Portable Case

Make thread identification faster and easier with this 78-piece nut and bolt thread checker set. Designed for garages, workshops, maintenance work, automotive repair, and DIY projects, this set includes 41 SAE sizes and 37 metric sizes in one organized portable case.

Each gauge is removable for convenient use in tight or hard-to-reach spaces. The blue SAE gauges and red metric gauges are easy to distinguish, while dual-sided laser markings help you quickly read each size during use.

Product Features

• 78-piece complete thread checker set
  Includes 41 SAE sizes and 37 metric sizes for a wide range of nut and bolt identification needs.
• Wide size coverage
  SAE range: #1-64 to 1-12
  Metric range: M2 x 0.4 to M24 x 3.0
• Removable individual gauges
  Each gauge can be removed from the case, making it easier to check fasteners in recessed, narrow, or awkward spaces.
• Dual-sided laser markings
  Clear size markings are engraved on both the top and side of each gauge for fast reading and long-lasting visibility.
• Color-coded design
  Blue gauges are for SAE sizes and red gauges are for metric sizes, helping reduce confusion and save time.
• Durable anodized aluminum construction
  Built from reinforced anodized aluminum for strength, corrosion resistance, wear resistance, and reliable long-term use.
• Organized portable storage case
  Comes with a hard storage case and foam insert to keep all 78 gauges secure, neat, and easy to find.
• Useful for many applications
  Ideal for garages, repair shops, machine work, maintenance crews, mechanics, and home DIY users.

How to Use

1. Select the bolt or nut you want to identify.
2. Match it with the corresponding gauge.
3. Turn by hand to check for a smooth fit.
4. If resistance occurs, do not force the thread and try another size.

Specifications

• Product Type: Nut and Bolt Thread Checker Set
• Total Pieces: 78
• SAE Sizes: 41
• Metric Sizes: 37
• Material: Anodized Aluminum
• Color: Blue and Red
• Storage Type: Portable Hard Case
• Marking Type: Dual-Sided Laser Markings

Package Includes

• 1 x 78PCS Nut and Bolt Thread Checker Set
• 1 x Portable Storage Case

Ideal For

• Garage use
• Workshop use
• Automotive repair
• Machinery maintenance
• Tool organization
• DIY repair projects

Note

• Please check the size range before purchase.
• Colors may vary slightly due to lighting and screen differences.
• For best results, always check threads by hand first and avoid forcing mismatched fasteners.