Mitsutoyo 368-172 HT-88R 3-Point Hole Test Gauge 75-88mm, 0.005mm D MITSUTOYO 368-172 HT-88R Three-point hole test. ✔ C:Type: Three-Point Hole Test Gauge. We will help you to find what you are looking for by searching all over Japan. ✔ C:Part Number: 368-172. byJuly 5, 2026