Bolt Thread Gauge Inch & Metric
- Screw Sizes (smooth bore holes) - #0, 1, 2, 3, 4, 6, 8, 10, 12, and #14.
- UNC Threads - 6-32, 8-32, 10-24, 1/4-20, 5/16-18, 3/8-16, 7/16-14, and 1/2-13.
- UNF Threads - 10-32, 1/4-28, 5/16-24, 3/8-24, 7/16-20, and 1/2-20.
- Metric Threads (Standard, Fine, and Extra Fine) - M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, and M12x1.75.
- Fractions - 0 to 6" graduated in 1/16'ths of an inch. Metric - 0 to 15 Centimeters graduated in millimeters.