Groove Gauges, Plastic, 17 sizes: 6 mm to 38 mm, METRIC-Pkg of 5 – Wire Rope Technical Board
Face Groove and Hole Locations Gages (BX-BXG Series) - Face Groove and Hole Locations - API 6A Seal Ring Groove Gage - BX and R-RX - Gagemaker Thread Measuring Instruments - Measuring Instruments
Dyer "Classic" Direct Reading ID Groove Gage, with Range Range: 0.2 - 0.6" - 104-102 - Light Tool Supply