Test, don't guess! The Hillman Vertical Bolt & Nut Gauge takes a wide range of commonly used sizes of nuts, bolts, washers, and screws and puts them on one compact and easy to use tool so you can know for sure the dimensions of the fastener you have in hand. It is a time and money saver that will help you reduce the seemingly endless sorting and fumbling for the right size. Gauge is set up to check fasteners in UNC and UNF thread, Metric thread, and screw sizes. It also includes a 6 inch fractional scale and a 15 centimeter metric scale.
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
This durable steel Gauge is approximately 37 inches long by 3-1/8 inches wide x 3/8 inch thick, and has mounting / hanging holes at both top and bottom. Imported