Fowler Acme Inch Thread Gage

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This gage is a standard for grinding & setting tools when cutting Acme threads. 29 degree pitch. Range of pitch: 1-10 (1, 1-1/2, 2, 3, 4, 5, 6, 7, 8, 9, 10) Acme threads have the s ame depth as square threads, but the sides of the thread are at an inclination of 14-1⁄2 degrees (29 degrees included angle or 30 degrees for metric). Angles & edges hardened and ground. Show more