2X CENTURY SAE / METRIC THREAD PITCH GAUGE [12-40 SAE] [.50-1.75] 12 BLADE PER $16.99 Brand CENTURY Gage Type Thread Gage MPN 98401/98402 condition New CENTURY DRILL & TOOL SAE & MM THREAD PITCH GAUGE12 BLADE EACH12 - 40 FRACTIONAL0.50 - 1.75 METRIC [ALSO MEASURES NPT AND BSPMEASURES EXTERNAL AND INTERNAL THREAD