Check the listing for details. Thread Pitch Identification Gauge - Measure or size thread diameter, determine... Condition: New. Listed at 19.95 USD. Thread Pitch Identification Gauge The Thread Pitch Identification Gauge is a handy tool! Lightweight at less than 1 oz, but made of strong aluminum has multiple unique features: gage holes to size the bolt thread diameter, gage threads on either side of the gage to determine the threads per inch (tpi) or pitch (mm), and a chart on the back to identify the thread size. Size - Overall: 80.00mm x 145.00mm 3.149" Inches x 5.708" Inches Material: Aluminum Thickness: 0.9mm 0.0354" Inches Pitches: 3.0, 2.5, 2.0, 1.75, 1.5, 1.25, 1.0, 0.8 (mm) 10, 11, 12, 13, 14, 16, 18, 20, 24, 28 (tpi) Hole Diameters: M2.5, M3, M3.5, M4, M5, M6, M7, M8, M10, M12, M14, M16, M18, M20 No. 2, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 3/4" Weight: 20.5 Grams 0.723 oz