Product Description Screw Pitch Gauge Product Specification Code No. Degree Leaves Measures SPG 55° & 60° 30 4 – 42 & 3.5 – 60 SPG-SS 55° & 60° 30 4 – 42 & 3.5 – 60 APG – 16 1n to 10n TSPG 30 8 4 to 12 mm