JIS 30° Flare connections include the series of inch (BSP) threads and metric threads. This section is dedicated to JIS 30° Flare Metric, or “KOMATSU” connection (due to its near exclusive use on KOMATSU brand equipment).
Measurement Procedure:
1) With calipers, measure the O.D. (outside diameter) of the male threads or the I.D. (inside diameter) of the Female Threads.
2) Check the thread pitch with thread pitch gauge.
3) Check the flare angle (30°) with the seat angle gauge.
4) Compare measurements against chart.