Imperial Screw & Bolt Gauge

Key Features

1. Standard Size Identification: Easily measure common Imperial diameters, including #4, #6, #8, #10, 1/4", and 5/16".
2. Built-in SAE Length Ruler: Features a precision-calibrated scale to measure bolt and screw lengths up to 3 inches instantly.
3. Tapered Testing Holes: Each sizing hole is engineered for a precise fit, helping you distinguish between similar diameters with ease.
4. Indestructible Markings: Sizes are debossed directly into the 3D-printed body, ensuring the labels remain legible even after years of heavy workshop use.
5. Workshop Ready: Compact, lightweight, and impact-resistant—designed to sit flat on a workbench or fit inside a portable tool chest.