Screw Pitch Gages 476 Whitworth St andard Screw Pitch Gages 55º THREADS 3-1/2 - 60 TPI (INCH) 156M, 159M Interna tional Metric St andard Screw Pitch Gages 60º THREADS 472 473 156M 159M 476 Screw Pitch Gages Cat. No. EDP No. of Leaves TPI Range Threads per Inch (TPI) Description 472 52484 51 4–84 First Corner 17 Leaves: 4, 4-1/2, 5, 5-1/2, 6, 7, 8, 9, 10, 11, 11-1/2, 12, 13, 14, 15, 16, 18 Second Corner 17 Leaves: 20, 22, 24, 26, 27, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50 Third Corner 17 Leaves: 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84 With Locking Device and 11-1/2 and 27 Pipe Thread Pitches 473 52485 30 6–60 6, 7, 8, 9, 10, 11, 11-1/2, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 30, 32, 34, 36, 38, 40, 42, 48, 50, 56, 60 With Positive Stop and 11-1/2 and 27 Pipe Thread Pitches 476 52488 30 3-1/2–60 3-1/2, 4, 4-1/2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 36, 40, 44, 48, 50, 60 With Positive Stop 156M 50589 28 0.25-2.50mm 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 1, 1.10, 1.20, 1.25, 1.30, 1.40, 1.50, 1.60, 1.70, 1.75, 1.80, 1.90, 2, 2.50 With Locking Device 159M 50591 28 0.5-11.5mm 0.5, 0.75, 1, 1.10, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5 With Locking Device and 60º Center Gage 333 starrett.com F ixed G age S t andards