For thread pitch gauges for iso metric screw thread pitch 0.25 to 6.00 mm
ISI
For thread pitch gauges for iso metric screw thread pitch 0.25 to 6.00 mm - N Delhi ISI 1967 - 4211 .
For thread pitch gauges for iso metric screw thread pitch 0.25 to 6.00 mm - N Delhi ISI 1967 - 4211 .